./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i15_o15-1.c --full-output --witness-type correctness_witness --validate ../results/automizer-verification-files/SV-COMP24_unreach-call/id_i15_o15-1.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_i15_o15-1.c ../results/automizer-verification-files/SV-COMP24_unreach-call/id_i15_o15-1.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 06:27:13,973 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 06:27:14,041 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 06:27:14,045 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 06:27:14,045 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 06:27:14,074 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 06:27:14,075 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 06:27:14,075 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 06:27:14,080 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 06:27:14,081 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 06:27:14,081 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 06:27:14,081 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 06:27:14,082 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 06:27:14,082 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 06:27:14,082 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 06:27:14,083 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 06:27:14,083 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 06:27:14,083 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 06:27:14,084 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 06:27:14,084 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 06:27:14,088 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 06:27:14,089 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 06:27:14,089 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 06:27:14,089 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 06:27:14,089 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 06:27:14,089 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 06:27:14,090 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 06:27:14,090 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 06:27:14,090 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 06:27:14,090 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 06:27:14,090 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 06:27:14,091 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 06:27:14,091 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 06:27:14,091 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 06:27:14,091 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 06:27:14,091 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 06:27:14,092 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 06:27:14,092 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 06:27:14,092 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 06:27:14,093 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 06:27:14,094 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 06:27:14,094 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 06:27:14,094 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> None [2024-09-13 06:27:14,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 06:27:14,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 06:27:14,365 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 06:27:14,366 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 06:27:14,366 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 06:27:14,367 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive-simple/id_i15_o15-1.c [2024-09-13 06:27:15,919 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 06:27:16,082 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 06:27:16,082 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/id_i15_o15-1.c [2024-09-13 06:27:16,090 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/736dfa2c1/e41681086fad4513992f155c49ed7cf5/FLAGe1127560b [2024-09-13 06:27:16,482 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/736dfa2c1/e41681086fad4513992f155c49ed7cf5 [2024-09-13 06:27:16,484 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-09-13 06:27:16,486 INFO L274 PluginConnector]: Witness Parser initialized [2024-09-13 06:27:16,486 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../results/automizer-verification-files/SV-COMP24_unreach-call/id_i15_o15-1.yml/witness-2.1.yml [2024-09-13 06:27:16,532 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 06:27:16,533 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-09-13 06:27:16,536 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 06:27:16,536 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 06:27:16,541 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 06:27:16,542 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 06:27:16" (1/2) ... [2024-09-13 06:27:16,543 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6852380c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:27:16, skipping insertion in model container [2024-09-13 06:27:16,543 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 06:27:16" (1/2) ... [2024-09-13 06:27:16,544 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@fe7ffbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:27:16, skipping insertion in model container [2024-09-13 06:27:16,544 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 06:27:16" (2/2) ... [2024-09-13 06:27:16,545 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6852380c and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:27:16, skipping insertion in model container [2024-09-13 06:27:16,545 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 06:27:16" (2/2) ... [2024-09-13 06:27:16,551 INFO L93 nessWitnessExtractor]: Found the following entries in the witness: [2024-09-13 06:27:16,554 INFO L1541 ArrayList]: Function contract at [L6]: requires null, ensures ((((((((((((((((((3 == \result) && (\old(x) == 3)) || (15 < \old(x))) || ((11 == \result) && (\old(x) == 11))) || ((\old(x) == 6) && (6 == \result))) || ((9 == \result) && (\old(x) == 9))) || ((2 == \result) && (\old(x) == 2))) || ((10 == \result) && (\old(x) == 10))) || ((5 == \result) && (5 == \old(x)))) || ((8 == \result) && (\old(x) == 8))) || ((7 == \result) && (7 == \old(x)))) || ((12 == \result) && (\old(x) == 12))) || ((\result == 1) && (\old(x) == 1))) || ((14 == \result) && (\old(x) == 14))) || ((\old(x) == 4) && (4 == \result))) || ((\old(x) == 15) && (15 == \result))) || ((13 == \result) && (\old(x) == 13))) || ((\result == 0) && (\old(x) == 0))) [2024-09-13 06:27:16,568 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 06:27:16,719 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_i15_o15-1.c[454,467] [2024-09-13 06:27:16,723 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 06:27:16,737 INFO L200 MainTranslator]: Completed pre-run Start Parsing Global [2024-09-13 06:27:16,793 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_i15_o15-1.c[454,467] [2024-09-13 06:27:16,794 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 06:27:16,817 INFO L204 MainTranslator]: Completed translation [2024-09-13 06:27:16,818 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:27:16 WrapperNode [2024-09-13 06:27:16,818 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 06:27:16,819 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 06:27:16,820 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 06:27:16,820 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 06:27:16,827 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 06:27:16" (1/1) ... [2024-09-13 06:27:16,834 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 06:27:16" (1/1) ... [2024-09-13 06:27:16,850 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2024-09-13 06:27:16,850 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 06:27:16,851 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 06:27:16,851 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 06:27:16,852 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 06:27:16,861 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 06:27:16" (1/1) ... [2024-09-13 06:27:16,861 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 06:27:16" (1/1) ... [2024-09-13 06:27:16,867 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 06:27:16" (1/1) ... [2024-09-13 06:27:16,879 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 06:27:16,880 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 06:27:16" (1/1) ... [2024-09-13 06:27:16,880 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 06:27:16" (1/1) ... [2024-09-13 06:27:16,884 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 06:27:16" (1/1) ... [2024-09-13 06:27:16,886 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 06:27:16" (1/1) ... [2024-09-13 06:27:16,891 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 06:27:16" (1/1) ... [2024-09-13 06:27:16,892 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 06:27:16" (1/1) ... [2024-09-13 06:27:16,893 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 06:27:16,894 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 06:27:16,894 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 06:27:16,894 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 06:27:16,895 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 06:27:16" (1/1) ... [2024-09-13 06:27:16,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 06:27:16,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:16,927 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 06:27:16,933 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 06:27:16,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 06:27:16,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 06:27:16,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 06:27:16,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-09-13 06:27:16,976 INFO L130 BoogieDeclarations]: Found specification of procedure id [2024-09-13 06:27:16,976 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2024-09-13 06:27:17,057 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 06:27:17,059 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 06:27:17,204 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-13 06:27:17,204 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 06:27:17,241 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 06:27:17,242 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-13 06:27:17,245 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 06:27:17 BoogieIcfgContainer [2024-09-13 06:27:17,245 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 06:27:17,251 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 06:27:17,251 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 06:27:17,256 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 06:27:17,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 06:27:16" (1/4) ... [2024-09-13 06:27:17,259 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31040830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 06:27:17, skipping insertion in model container [2024-09-13 06:27:17,260 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 06:27:16" (2/4) ... [2024-09-13 06:27:17,260 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31040830 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 13.09 06:27:17, skipping insertion in model container [2024-09-13 06:27:17,260 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 06:27:16" (3/4) ... [2024-09-13 06:27:17,261 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31040830 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 13.09 06:27:17, skipping insertion in model container [2024-09-13 06:27:17,261 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 06:27:17" (4/4) ... [2024-09-13 06:27:17,263 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i15_o15-1.c [2024-09-13 06:27:17,279 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 06:27:17,279 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-09-13 06:27:17,322 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 06:27:17,330 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;@737766d9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 06:27:17,330 INFO L337 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-09-13 06:27:17,335 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 06:27:17,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-09-13 06:27:17,342 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:17,343 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-09-13 06:27:17,343 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:17,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:17,349 INFO L85 PathProgramCache]: Analyzing trace with hash 56172024, now seen corresponding path program 1 times [2024-09-13 06:27:17,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:17,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455777564] [2024-09-13 06:27:17,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:17,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:17,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:17,627 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 06:27:17,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:17,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455777564] [2024-09-13 06:27:17,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455777564] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 06:27:17,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 06:27:17,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-13 06:27:17,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347709744] [2024-09-13 06:27:17,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 06:27:17,644 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 06:27:17,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:17,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 06:27:17,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 06:27:17,692 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 06:27:17,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:17,809 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2024-09-13 06:27:17,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 06:27:17,812 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 06:27:17,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:17,818 INFO L225 Difference]: With dead ends: 22 [2024-09-13 06:27:17,818 INFO L226 Difference]: Without dead ends: 20 [2024-09-13 06:27:17,820 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 06:27:17,823 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 06:27:17,824 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 34 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 06:27:17,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-09-13 06:27:17,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2024-09-13 06:27:17,857 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 06:27:17,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2024-09-13 06:27:17,858 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 5 [2024-09-13 06:27:17,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:17,859 INFO L474 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2024-09-13 06:27:17,859 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 06:27:17,859 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2024-09-13 06:27:17,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-09-13 06:27:17,860 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:17,860 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-09-13 06:27:17,860 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 06:27:17,860 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:17,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:17,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1615449573, now seen corresponding path program 1 times [2024-09-13 06:27:17,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:17,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051930408] [2024-09-13 06:27:17,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:17,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:17,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:18,044 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 06:27:18,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:18,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051930408] [2024-09-13 06:27:18,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051930408] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:18,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734848193] [2024-09-13 06:27:18,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:18,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:18,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:18,051 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 06:27:18,054 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 06:27:18,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:18,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-13 06:27:18,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:18,225 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 06:27:18,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:27:18,314 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 06:27:18,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734848193] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:27:18,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:27:18,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-09-13 06:27:18,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503740781] [2024-09-13 06:27:18,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:27:18,316 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-13 06:27:18,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:18,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-13 06:27:18,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2024-09-13 06:27:18,320 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 17 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 10 states have internal predecessors, (16), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 06:27:18,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:18,529 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2024-09-13 06:27:18,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-13 06:27:18,532 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 10 states have internal predecessors, (16), 6 states have call successors, (6), 6 states have call predecessors, (6), 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 06:27:18,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:18,533 INFO L225 Difference]: With dead ends: 41 [2024-09-13 06:27:18,533 INFO L226 Difference]: Without dead ends: 41 [2024-09-13 06:27:18,534 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2024-09-13 06:27:18,535 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 46 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 06:27:18,535 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 61 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 06:27:18,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-13 06:27:18,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2024-09-13 06:27:18,544 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 06:27:18,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2024-09-13 06:27:18,547 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 8 [2024-09-13 06:27:18,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:18,548 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2024-09-13 06:27:18,548 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 10 states have internal predecessors, (16), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 06:27:18,549 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2024-09-13 06:27:18,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-13 06:27:18,550 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:18,550 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1] [2024-09-13 06:27:18,569 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-13 06:27:18,754 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 06:27:18,755 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:18,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:18,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1295816760, now seen corresponding path program 2 times [2024-09-13 06:27:18,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:18,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673297194] [2024-09-13 06:27:18,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:18,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:18,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:18,969 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 06:27:18,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:18,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673297194] [2024-09-13 06:27:18,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673297194] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:18,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028668252] [2024-09-13 06:27:18,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 06:27:18,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:18,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:18,975 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 06:27:18,980 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 06:27:19,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-09-13 06:27:19,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:27:19,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 06:27:19,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:19,050 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 06:27:19,050 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 06:27:19,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028668252] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 06:27:19,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 06:27:19,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 15 [2024-09-13 06:27:19,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749446078] [2024-09-13 06:27:19,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 06:27:19,052 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 06:27:19,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:19,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 06:27:19,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-09-13 06:27:19,053 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 06:27:19,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:19,081 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2024-09-13 06:27:19,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-13 06:27:19,082 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 06:27:19,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:19,084 INFO L225 Difference]: With dead ends: 39 [2024-09-13 06:27:19,084 INFO L226 Difference]: Without dead ends: 39 [2024-09-13 06:27:19,085 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-09-13 06:27:19,086 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 06:27:19,086 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 06:27:19,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-13 06:27:19,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2024-09-13 06:27:19,096 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 06:27:19,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2024-09-13 06:27:19,098 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 17 [2024-09-13 06:27:19,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:19,099 INFO L474 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2024-09-13 06:27:19,099 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 06:27:19,099 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2024-09-13 06:27:19,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-13 06:27:19,100 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:19,100 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 06:27:19,117 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-13 06:27:19,304 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 06:27:19,305 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:19,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:19,306 INFO L85 PathProgramCache]: Analyzing trace with hash 511038535, now seen corresponding path program 1 times [2024-09-13 06:27:19,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:19,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899019128] [2024-09-13 06:27:19,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:19,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:19,494 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-13 06:27:19,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:19,559 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 06:27:19,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:19,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899019128] [2024-09-13 06:27:19,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899019128] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:19,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141242982] [2024-09-13 06:27:19,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:19,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:19,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:19,564 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 06:27:19,567 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 06:27:19,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:19,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-13 06:27:19,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:19,862 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 06:27:19,862 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:27:20,111 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 06:27:20,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141242982] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:27:20,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:27:20,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2024-09-13 06:27:20,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040954840] [2024-09-13 06:27:20,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:27:20,113 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-13 06:27:20,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:20,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-13 06:27:20,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2024-09-13 06:27:20,116 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 29 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 18 states have internal predecessors, (32), 12 states have call successors, (12), 11 states have call predecessors, (12), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 06:27:20,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:20,541 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2024-09-13 06:27:20,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-13 06:27:20,542 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 18 states have internal predecessors, (32), 12 states have call successors, (12), 11 states have call predecessors, (12), 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 06:27:20,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:20,543 INFO L225 Difference]: With dead ends: 71 [2024-09-13 06:27:20,543 INFO L226 Difference]: Without dead ends: 71 [2024-09-13 06:27:20,544 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=307, Invalid=1099, Unknown=0, NotChecked=0, Total=1406 [2024-09-13 06:27:20,545 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 111 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 06:27:20,545 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 102 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 06:27:20,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-13 06:27:20,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2024-09-13 06:27:20,550 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 06:27:20,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2024-09-13 06:27:20,552 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 20 [2024-09-13 06:27:20,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:20,552 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2024-09-13 06:27:20,552 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 18 states have internal predecessors, (32), 12 states have call successors, (12), 11 states have call predecessors, (12), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 06:27:20,552 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2024-09-13 06:27:20,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-13 06:27:20,553 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:20,553 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 06:27:20,568 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-13 06:27:20,757 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 06:27:20,758 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:20,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:20,759 INFO L85 PathProgramCache]: Analyzing trace with hash 756088836, now seen corresponding path program 2 times [2024-09-13 06:27:20,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:20,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939971179] [2024-09-13 06:27:20,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:20,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:20,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:21,053 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-13 06:27:21,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:21,094 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 1 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 06:27:21,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:21,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939971179] [2024-09-13 06:27:21,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939971179] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:21,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148077350] [2024-09-13 06:27:21,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 06:27:21,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:21,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:21,097 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 06:27:21,099 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 06:27:21,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 06:27:21,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:27:21,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-13 06:27:21,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:21,303 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 1 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 06:27:21,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:27:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 1 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 06:27:21,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148077350] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:27:21,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:27:21,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 41 [2024-09-13 06:27:21,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551525709] [2024-09-13 06:27:21,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:27:21,734 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-13 06:27:21,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:21,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-13 06:27:21,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2024-09-13 06:27:21,736 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 41 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 24 states have internal predecessors, (44), 18 states have call successors, (19), 17 states have call predecessors, (19), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 06:27:22,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:22,406 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2024-09-13 06:27:22,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-13 06:27:22,407 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 24 states have internal predecessors, (44), 18 states have call successors, (19), 17 states have call predecessors, (19), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2024-09-13 06:27:22,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:22,408 INFO L225 Difference]: With dead ends: 113 [2024-09-13 06:27:22,408 INFO L226 Difference]: Without dead ends: 113 [2024-09-13 06:27:22,410 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 43 SyntacticMatches, 9 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=718, Invalid=2362, Unknown=0, NotChecked=0, Total=3080 [2024-09-13 06:27:22,410 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 191 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 06:27:22,411 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 175 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 06:27:22,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-09-13 06:27:22,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 99. [2024-09-13 06:27:22,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 65 states have (on average 1.2461538461538462) internal successors, (81), 67 states have internal predecessors, (81), 16 states have call successors, (16), 15 states have call predecessors, (16), 16 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2024-09-13 06:27:22,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 114 transitions. [2024-09-13 06:27:22,420 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 114 transitions. Word has length 35 [2024-09-13 06:27:22,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:22,421 INFO L474 AbstractCegarLoop]: Abstraction has 99 states and 114 transitions. [2024-09-13 06:27:22,421 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 24 states have internal predecessors, (44), 18 states have call successors, (19), 17 states have call predecessors, (19), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 06:27:22,421 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 114 transitions. [2024-09-13 06:27:22,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-13 06:27:22,422 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:22,422 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 06:27:22,439 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-13 06:27:22,623 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 06:27:22,623 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:22,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:22,624 INFO L85 PathProgramCache]: Analyzing trace with hash -952693916, now seen corresponding path program 3 times [2024-09-13 06:27:22,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:22,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218883835] [2024-09-13 06:27:22,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:22,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:22,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:23,416 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-13 06:27:23,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:23,525 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 0 proven. 346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 06:27:23,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:23,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218883835] [2024-09-13 06:27:23,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218883835] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:23,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380624993] [2024-09-13 06:27:23,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 06:27:23,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:23,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:23,528 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 06:27:23,531 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 06:27:23,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-13 06:27:23,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:27:23,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-13 06:27:23,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:23,604 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2024-09-13 06:27:23,605 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:27:23,733 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2024-09-13 06:27:23,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380624993] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:27:23,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:27:23,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 5, 6] total 37 [2024-09-13 06:27:23,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514555376] [2024-09-13 06:27:23,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:27:23,736 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-13 06:27:23,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:23,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-13 06:27:23,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1297, Unknown=0, NotChecked=0, Total=1406 [2024-09-13 06:27:23,741 INFO L87 Difference]: Start difference. First operand 99 states and 114 transitions. Second operand has 38 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 23 states have internal predecessors, (44), 19 states have call successors, (20), 16 states have call predecessors, (20), 1 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 06:27:25,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:25,218 INFO L93 Difference]: Finished difference Result 165 states and 182 transitions. [2024-09-13 06:27:25,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-13 06:27:25,219 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 23 states have internal predecessors, (44), 19 states have call successors, (20), 16 states have call predecessors, (20), 1 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 53 [2024-09-13 06:27:25,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:25,221 INFO L225 Difference]: With dead ends: 165 [2024-09-13 06:27:25,221 INFO L226 Difference]: Without dead ends: 165 [2024-09-13 06:27:25,222 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=229, Invalid=2741, Unknown=0, NotChecked=0, Total=2970 [2024-09-13 06:27:25,223 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 215 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 2860 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 2860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-13 06:27:25,223 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 497 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 2860 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-13 06:27:25,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-09-13 06:27:25,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 149. [2024-09-13 06:27:25,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 99 states have (on average 1.3131313131313131) internal successors, (130), 100 states have internal predecessors, (130), 17 states have call successors, (17), 16 states have call predecessors, (17), 31 states have return successors, (34), 32 states have call predecessors, (34), 17 states have call successors, (34) [2024-09-13 06:27:25,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 181 transitions. [2024-09-13 06:27:25,235 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 181 transitions. Word has length 53 [2024-09-13 06:27:25,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:25,235 INFO L474 AbstractCegarLoop]: Abstraction has 149 states and 181 transitions. [2024-09-13 06:27:25,235 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 23 states have internal predecessors, (44), 19 states have call successors, (20), 16 states have call predecessors, (20), 1 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 06:27:25,235 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 181 transitions. [2024-09-13 06:27:25,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-13 06:27:25,237 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:25,237 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 2, 2, 2, 1, 1, 1, 1] [2024-09-13 06:27:25,256 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 06:27:25,437 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 06:27:25,438 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:25,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:25,439 INFO L85 PathProgramCache]: Analyzing trace with hash -560561765, now seen corresponding path program 4 times [2024-09-13 06:27:25,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:25,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796702933] [2024-09-13 06:27:25,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:25,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:25,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:26,116 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-13 06:27:26,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:26,184 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:26,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:26,249 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 1 proven. 348 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 06:27:26,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:26,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796702933] [2024-09-13 06:27:26,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796702933] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:26,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082840123] [2024-09-13 06:27:26,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 06:27:26,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:26,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:26,256 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 06:27:26,258 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 06:27:26,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 06:27:26,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:27:26,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-13 06:27:26,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:26,427 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 65 proven. 5 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2024-09-13 06:27:26,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:27:26,627 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 65 proven. 9 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-09-13 06:27:26,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082840123] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:27:26,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:27:26,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 7, 9] total 40 [2024-09-13 06:27:26,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399048133] [2024-09-13 06:27:26,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:27:26,630 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-13 06:27:26,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:26,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-13 06:27:26,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1509, Unknown=0, NotChecked=0, Total=1640 [2024-09-13 06:27:26,632 INFO L87 Difference]: Start difference. First operand 149 states and 181 transitions. Second operand has 41 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 25 states have internal predecessors, (48), 19 states have call successors, (20), 15 states have call predecessors, (20), 3 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-13 06:27:28,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:28,093 INFO L93 Difference]: Finished difference Result 166 states and 183 transitions. [2024-09-13 06:27:28,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-13 06:27:28,094 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 25 states have internal predecessors, (48), 19 states have call successors, (20), 15 states have call predecessors, (20), 3 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 56 [2024-09-13 06:27:28,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:28,095 INFO L225 Difference]: With dead ends: 166 [2024-09-13 06:27:28,095 INFO L226 Difference]: Without dead ends: 166 [2024-09-13 06:27:28,096 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=276, Invalid=3146, Unknown=0, NotChecked=0, Total=3422 [2024-09-13 06:27:28,096 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 228 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 2999 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 3117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 2999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-13 06:27:28,097 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 437 Invalid, 3117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 2999 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-13 06:27:28,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-09-13 06:27:28,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 152. [2024-09-13 06:27:28,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 101 states have (on average 1.297029702970297) internal successors, (131), 102 states have internal predecessors, (131), 17 states have call successors, (17), 16 states have call predecessors, (17), 32 states have return successors, (35), 33 states have call predecessors, (35), 17 states have call successors, (35) [2024-09-13 06:27:28,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 183 transitions. [2024-09-13 06:27:28,115 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 183 transitions. Word has length 56 [2024-09-13 06:27:28,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:28,115 INFO L474 AbstractCegarLoop]: Abstraction has 152 states and 183 transitions. [2024-09-13 06:27:28,116 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 25 states have internal predecessors, (48), 19 states have call successors, (20), 15 states have call predecessors, (20), 3 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-13 06:27:28,116 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 183 transitions. [2024-09-13 06:27:28,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-13 06:27:28,120 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:28,120 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 1, 1, 1, 1] [2024-09-13 06:27:28,136 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 06:27:28,321 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 06:27:28,321 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:28,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:28,322 INFO L85 PathProgramCache]: Analyzing trace with hash -862696444, now seen corresponding path program 5 times [2024-09-13 06:27:28,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:28,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744494373] [2024-09-13 06:27:28,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:28,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:28,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:28,842 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-13 06:27:28,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:28,924 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:28,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:28,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:29,049 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 2 proven. 350 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-13 06:27:29,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:29,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744494373] [2024-09-13 06:27:29,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744494373] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:29,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78154836] [2024-09-13 06:27:29,051 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 06:27:29,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:29,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:29,053 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 06:27:29,054 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 06:27:29,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2024-09-13 06:27:29,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:27:29,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-13 06:27:29,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:29,256 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 0 proven. 350 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-13 06:27:29,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:27:29,362 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 0 proven. 350 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-13 06:27:29,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78154836] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:27:29,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:27:29,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 36 [2024-09-13 06:27:29,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720052977] [2024-09-13 06:27:29,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:27:29,364 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-13 06:27:29,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:29,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-13 06:27:29,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1258, Unknown=0, NotChecked=0, Total=1332 [2024-09-13 06:27:29,365 INFO L87 Difference]: Start difference. First operand 152 states and 183 transitions. Second operand has 37 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 22 states have internal predecessors, (40), 15 states have call successors, (15), 14 states have call predecessors, (15), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 06:27:30,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:30,751 INFO L93 Difference]: Finished difference Result 168 states and 186 transitions. [2024-09-13 06:27:30,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-13 06:27:30,752 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 22 states have internal predecessors, (40), 15 states have call successors, (15), 14 states have call predecessors, (15), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2024-09-13 06:27:30,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:30,754 INFO L225 Difference]: With dead ends: 168 [2024-09-13 06:27:30,754 INFO L226 Difference]: Without dead ends: 168 [2024-09-13 06:27:30,755 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=166, Invalid=2914, Unknown=0, NotChecked=0, Total=3080 [2024-09-13 06:27:30,759 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 161 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 2986 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 3025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 2986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-13 06:27:30,759 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 434 Invalid, 3025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 2986 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-13 06:27:30,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-09-13 06:27:30,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 155. [2024-09-13 06:27:30,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 103 states have (on average 1.2912621359223302) internal successors, (133), 104 states have internal predecessors, (133), 17 states have call successors, (17), 16 states have call predecessors, (17), 33 states have return successors, (36), 34 states have call predecessors, (36), 17 states have call successors, (36) [2024-09-13 06:27:30,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 186 transitions. [2024-09-13 06:27:30,769 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 186 transitions. Word has length 59 [2024-09-13 06:27:30,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:30,770 INFO L474 AbstractCegarLoop]: Abstraction has 155 states and 186 transitions. [2024-09-13 06:27:30,770 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 22 states have internal predecessors, (40), 15 states have call successors, (15), 14 states have call predecessors, (15), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 06:27:30,770 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 186 transitions. [2024-09-13 06:27:30,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-13 06:27:30,772 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:30,772 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 18, 3, 3, 3, 1, 1, 1, 1] [2024-09-13 06:27:30,791 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 06:27:30,974 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 06:27:30,975 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:30,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:30,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1280942791, now seen corresponding path program 6 times [2024-09-13 06:27:30,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:30,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213274453] [2024-09-13 06:27:30,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:30,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:30,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:31,505 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-13 06:27:31,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:31,566 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:31,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:31,608 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:31,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:31,660 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 309 proven. 193 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-13 06:27:31,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:31,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213274453] [2024-09-13 06:27:31,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213274453] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:31,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298060062] [2024-09-13 06:27:31,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 06:27:31,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:31,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:31,663 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 06:27:31,665 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 06:27:31,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-09-13 06:27:31,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:27:31,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-13 06:27:31,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:31,933 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 105 proven. 12 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2024-09-13 06:27:31,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:27:32,169 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 105 proven. 21 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2024-09-13 06:27:32,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298060062] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:27:32,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:27:32,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 9, 12] total 51 [2024-09-13 06:27:32,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312703635] [2024-09-13 06:27:32,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:27:32,170 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-13 06:27:32,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:32,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-13 06:27:32,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=2113, Unknown=0, NotChecked=0, Total=2550 [2024-09-13 06:27:32,174 INFO L87 Difference]: Start difference. First operand 155 states and 186 transitions. Second operand has 51 states, 50 states have (on average 1.26) internal successors, (63), 32 states have internal predecessors, (63), 22 states have call successors, (23), 17 states have call predecessors, (23), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-13 06:27:32,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:32,887 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2024-09-13 06:27:32,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-09-13 06:27:32,888 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.26) internal successors, (63), 32 states have internal predecessors, (63), 22 states have call successors, (23), 17 states have call predecessors, (23), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 68 [2024-09-13 06:27:32,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:32,889 INFO L225 Difference]: With dead ends: 113 [2024-09-13 06:27:32,889 INFO L226 Difference]: Without dead ends: 112 [2024-09-13 06:27:32,890 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1533, Invalid=5439, Unknown=0, NotChecked=0, Total=6972 [2024-09-13 06:27:32,891 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 409 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 06:27:32,891 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 113 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 06:27:32,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-09-13 06:27:32,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 101. [2024-09-13 06:27:32,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 67 states have (on average 1.1791044776119404) internal successors, (79), 68 states have internal predecessors, (79), 16 states have call successors, (16), 16 states have call predecessors, (16), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-13 06:27:32,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2024-09-13 06:27:32,897 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 68 [2024-09-13 06:27:32,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:32,897 INFO L474 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2024-09-13 06:27:32,897 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 1.26) internal successors, (63), 32 states have internal predecessors, (63), 22 states have call successors, (23), 17 states have call predecessors, (23), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-13 06:27:32,897 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2024-09-13 06:27:32,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-13 06:27:32,898 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:32,899 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 1, 1, 1, 1] [2024-09-13 06:27:32,915 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-13 06:27:33,099 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 06:27:33,099 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:33,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:33,100 INFO L85 PathProgramCache]: Analyzing trace with hash 494533883, now seen corresponding path program 7 times [2024-09-13 06:27:33,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:33,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965921262] [2024-09-13 06:27:33,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:33,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:33,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:33,553 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-13 06:27:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:33,628 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:33,695 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:33,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:33,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:33,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:33,815 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 3 proven. 352 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 06:27:33,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:33,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965921262] [2024-09-13 06:27:33,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965921262] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:33,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650518172] [2024-09-13 06:27:33,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 06:27:33,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:33,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:33,817 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 06:27:33,817 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 06:27:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:33,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-13 06:27:33,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:33,933 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 06:27:33,933 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:27:34,022 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 06:27:34,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650518172] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:27:34,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:27:34,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 36 [2024-09-13 06:27:34,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303640263] [2024-09-13 06:27:34,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:27:34,023 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-13 06:27:34,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:34,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-13 06:27:34,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1258, Unknown=0, NotChecked=0, Total=1332 [2024-09-13 06:27:34,024 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 37 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 22 states have internal predecessors, (40), 14 states have call successors, (14), 13 states have call predecessors, (14), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-13 06:27:34,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:34,948 INFO L93 Difference]: Finished difference Result 111 states and 110 transitions. [2024-09-13 06:27:34,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-13 06:27:34,949 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 22 states have internal predecessors, (40), 14 states have call successors, (14), 13 states have call predecessors, (14), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 62 [2024-09-13 06:27:34,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:34,950 INFO L225 Difference]: With dead ends: 111 [2024-09-13 06:27:34,950 INFO L226 Difference]: Without dead ends: 111 [2024-09-13 06:27:34,950 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=169, Invalid=3023, Unknown=0, NotChecked=0, Total=3192 [2024-09-13 06:27:34,951 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 146 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 2960 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 2994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-13 06:27:34,951 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 390 Invalid, 2994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2960 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-13 06:27:34,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-09-13 06:27:34,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 101. [2024-09-13 06:27:34,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 67 states have (on average 1.164179104477612) internal successors, (78), 68 states have internal predecessors, (78), 16 states have call successors, (16), 16 states have call predecessors, (16), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-13 06:27:34,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 110 transitions. [2024-09-13 06:27:34,955 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 110 transitions. Word has length 62 [2024-09-13 06:27:34,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:34,955 INFO L474 AbstractCegarLoop]: Abstraction has 101 states and 110 transitions. [2024-09-13 06:27:34,956 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 22 states have internal predecessors, (40), 14 states have call successors, (14), 13 states have call predecessors, (14), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-13 06:27:34,956 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 110 transitions. [2024-09-13 06:27:34,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-13 06:27:34,957 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:34,957 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 5, 5, 5, 1, 1, 1, 1] [2024-09-13 06:27:34,970 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 06:27:35,157 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 06:27:35,157 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:35,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:35,158 INFO L85 PathProgramCache]: Analyzing trace with hash 921080996, now seen corresponding path program 8 times [2024-09-13 06:27:35,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:35,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150745365] [2024-09-13 06:27:35,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:35,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:35,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:35,562 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-13 06:27:35,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:35,649 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:35,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:35,739 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:35,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:35,808 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:35,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:35,863 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:35,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:35,920 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 4 proven. 354 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-13 06:27:35,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:35,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150745365] [2024-09-13 06:27:35,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150745365] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:35,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140854951] [2024-09-13 06:27:35,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 06:27:35,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:35,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:35,923 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 06:27:35,923 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 06:27:35,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 06:27:35,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:27:35,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-13 06:27:35,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:36,042 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-13 06:27:36,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:27:36,159 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-13 06:27:36,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140854951] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:27:36,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:27:36,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 36 [2024-09-13 06:27:36,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896299682] [2024-09-13 06:27:36,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:27:36,159 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-13 06:27:36,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:36,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-13 06:27:36,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1258, Unknown=0, NotChecked=0, Total=1332 [2024-09-13 06:27:36,160 INFO L87 Difference]: Start difference. First operand 101 states and 110 transitions. Second operand has 37 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 22 states have internal predecessors, (40), 13 states have call successors, (13), 12 states have call predecessors, (13), 6 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-13 06:27:37,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:37,073 INFO L93 Difference]: Finished difference Result 110 states and 109 transitions. [2024-09-13 06:27:37,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-13 06:27:37,073 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 22 states have internal predecessors, (40), 13 states have call successors, (13), 12 states have call predecessors, (13), 6 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) Word has length 65 [2024-09-13 06:27:37,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:37,074 INFO L225 Difference]: With dead ends: 110 [2024-09-13 06:27:37,074 INFO L226 Difference]: Without dead ends: 110 [2024-09-13 06:27:37,074 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=3134, Unknown=0, NotChecked=0, Total=3306 [2024-09-13 06:27:37,075 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 136 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 2872 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 2903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-13 06:27:37,075 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 347 Invalid, 2903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2872 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-13 06:27:37,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-09-13 06:27:37,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2024-09-13 06:27:37,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 68 states have internal predecessors, (77), 16 states have call successors, (16), 16 states have call predecessors, (16), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-13 06:27:37,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2024-09-13 06:27:37,078 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 65 [2024-09-13 06:27:37,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:37,078 INFO L474 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2024-09-13 06:27:37,078 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 22 states have internal predecessors, (40), 13 states have call successors, (13), 12 states have call predecessors, (13), 6 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-13 06:27:37,078 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2024-09-13 06:27:37,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-13 06:27:37,079 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:37,079 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 1, 1, 1, 1] [2024-09-13 06:27:37,091 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-13 06:27:37,280 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 06:27:37,281 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:37,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:37,281 INFO L85 PathProgramCache]: Analyzing trace with hash -622104485, now seen corresponding path program 9 times [2024-09-13 06:27:37,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:37,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076957134] [2024-09-13 06:27:37,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:37,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:37,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:37,605 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-13 06:27:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:37,702 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:37,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:37,773 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:37,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:37,836 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:37,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:37,893 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:37,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:37,953 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:37,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:38,012 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 5 proven. 356 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-13 06:27:38,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:38,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076957134] [2024-09-13 06:27:38,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076957134] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:38,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223064146] [2024-09-13 06:27:38,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 06:27:38,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:38,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:38,014 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 06:27:38,015 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 06:27:38,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-13 06:27:38,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:27:38,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-13 06:27:38,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:38,351 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 117 proven. 51 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2024-09-13 06:27:38,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:27:38,918 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 117 proven. 87 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-13 06:27:38,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223064146] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:27:38,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:27:38,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 15, 21] total 52 [2024-09-13 06:27:38,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953034767] [2024-09-13 06:27:38,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:27:38,919 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-09-13 06:27:38,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:38,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-09-13 06:27:38,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=2557, Unknown=0, NotChecked=0, Total=2756 [2024-09-13 06:27:38,920 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand has 53 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 33 states have internal predecessors, (64), 19 states have call successors, (20), 11 states have call predecessors, (20), 11 states have return successors, (18), 11 states have call predecessors, (18), 9 states have call successors, (18) [2024-09-13 06:27:39,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:39,949 INFO L93 Difference]: Finished difference Result 109 states and 108 transitions. [2024-09-13 06:27:39,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-13 06:27:39,949 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 33 states have internal predecessors, (64), 19 states have call successors, (20), 11 states have call predecessors, (20), 11 states have return successors, (18), 11 states have call predecessors, (18), 9 states have call successors, (18) Word has length 68 [2024-09-13 06:27:39,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:39,950 INFO L225 Difference]: With dead ends: 109 [2024-09-13 06:27:39,950 INFO L226 Difference]: Without dead ends: 109 [2024-09-13 06:27:39,951 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=464, Invalid=5086, Unknown=0, NotChecked=0, Total=5550 [2024-09-13 06:27:39,952 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 115 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 3223 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 3252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 3223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-13 06:27:39,952 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 306 Invalid, 3252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 3223 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-13 06:27:39,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-09-13 06:27:39,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 101. [2024-09-13 06:27:39,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 68 states have internal predecessors, (76), 16 states have call successors, (16), 16 states have call predecessors, (16), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-13 06:27:39,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 108 transitions. [2024-09-13 06:27:39,954 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 108 transitions. Word has length 68 [2024-09-13 06:27:39,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:39,955 INFO L474 AbstractCegarLoop]: Abstraction has 101 states and 108 transitions. [2024-09-13 06:27:39,955 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 33 states have internal predecessors, (64), 19 states have call successors, (20), 11 states have call predecessors, (20), 11 states have return successors, (18), 11 states have call predecessors, (18), 9 states have call successors, (18) [2024-09-13 06:27:39,955 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 108 transitions. [2024-09-13 06:27:39,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-13 06:27:39,955 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:39,955 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 7, 7, 7, 1, 1, 1, 1] [2024-09-13 06:27:39,968 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 06:27:40,156 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 06:27:40,156 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:40,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:40,156 INFO L85 PathProgramCache]: Analyzing trace with hash -330832572, now seen corresponding path program 10 times [2024-09-13 06:27:40,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:40,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873449379] [2024-09-13 06:27:40,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:40,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:40,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:40,448 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-13 06:27:40,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:40,540 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:40,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:40,635 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:40,704 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:40,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:40,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:40,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:40,825 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:40,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:40,876 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:40,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:40,936 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 6 proven. 358 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-13 06:27:40,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:40,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873449379] [2024-09-13 06:27:40,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873449379] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:40,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391185608] [2024-09-13 06:27:40,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 06:27:40,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:40,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:40,939 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 06:27:40,941 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 06:27:40,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 06:27:40,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:27:40,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-09-13 06:27:40,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:41,303 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 120 proven. 70 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2024-09-13 06:27:41,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:27:42,016 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 120 proven. 119 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2024-09-13 06:27:42,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391185608] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:27:42,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:27:42,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 17, 24] total 55 [2024-09-13 06:27:42,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146162677] [2024-09-13 06:27:42,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:27:42,017 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-13 06:27:42,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:42,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-13 06:27:42,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=2869, Unknown=0, NotChecked=0, Total=3080 [2024-09-13 06:27:42,018 INFO L87 Difference]: Start difference. First operand 101 states and 108 transitions. Second operand has 56 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 35 states have internal predecessors, (68), 19 states have call successors, (20), 10 states have call predecessors, (20), 13 states have return successors, (21), 13 states have call predecessors, (21), 10 states have call successors, (21) [2024-09-13 06:27:43,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:43,101 INFO L93 Difference]: Finished difference Result 108 states and 107 transitions. [2024-09-13 06:27:43,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-13 06:27:43,101 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 35 states have internal predecessors, (68), 19 states have call successors, (20), 10 states have call predecessors, (20), 13 states have return successors, (21), 13 states have call predecessors, (21), 10 states have call successors, (21) Word has length 71 [2024-09-13 06:27:43,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:43,102 INFO L225 Difference]: With dead ends: 108 [2024-09-13 06:27:43,102 INFO L226 Difference]: Without dead ends: 108 [2024-09-13 06:27:43,103 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=511, Invalid=5651, Unknown=0, NotChecked=0, Total=6162 [2024-09-13 06:27:43,103 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 106 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 3459 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 3485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 3459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-13 06:27:43,104 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 285 Invalid, 3485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 3459 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-13 06:27:43,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-09-13 06:27:43,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 101. [2024-09-13 06:27:43,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 68 states have internal predecessors, (75), 16 states have call successors, (16), 16 states have call predecessors, (16), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-13 06:27:43,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 107 transitions. [2024-09-13 06:27:43,106 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 107 transitions. Word has length 71 [2024-09-13 06:27:43,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:43,106 INFO L474 AbstractCegarLoop]: Abstraction has 101 states and 107 transitions. [2024-09-13 06:27:43,107 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 35 states have internal predecessors, (68), 19 states have call successors, (20), 10 states have call predecessors, (20), 13 states have return successors, (21), 13 states have call predecessors, (21), 10 states have call successors, (21) [2024-09-13 06:27:43,107 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 107 transitions. [2024-09-13 06:27:43,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-13 06:27:43,107 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:43,107 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 8, 8, 8, 1, 1, 1, 1] [2024-09-13 06:27:43,120 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-13 06:27:43,308 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 06:27:43,308 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:43,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:43,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1116789691, now seen corresponding path program 11 times [2024-09-13 06:27:43,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:43,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416790209] [2024-09-13 06:27:43,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:43,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:43,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:43,610 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-13 06:27:43,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:43,721 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:43,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:43,811 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:43,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:43,894 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:43,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:43,963 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:43,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:44,041 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:44,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:44,091 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:44,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:44,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:44,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:44,175 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 7 proven. 360 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-09-13 06:27:44,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:44,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416790209] [2024-09-13 06:27:44,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416790209] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:44,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898550488] [2024-09-13 06:27:44,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 06:27:44,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:44,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:44,176 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 06:27:44,177 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 06:27:44,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2024-09-13 06:27:44,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:27:44,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-09-13 06:27:44,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:44,334 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 0 proven. 388 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-09-13 06:27:44,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:27:44,632 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-09-13 06:27:44,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898550488] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:27:44,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:27:44,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36, 34] total 37 [2024-09-13 06:27:44,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144514247] [2024-09-13 06:27:44,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:27:44,633 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-13 06:27:44,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:44,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-13 06:27:44,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1328, Unknown=0, NotChecked=0, Total=1406 [2024-09-13 06:27:44,634 INFO L87 Difference]: Start difference. First operand 101 states and 107 transitions. Second operand has 38 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 23 states have internal predecessors, (43), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (14), 8 states have call predecessors, (14), 4 states have call successors, (14) [2024-09-13 06:27:45,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:45,564 INFO L93 Difference]: Finished difference Result 107 states and 106 transitions. [2024-09-13 06:27:45,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-13 06:27:45,564 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 23 states have internal predecessors, (43), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (14), 8 states have call predecessors, (14), 4 states have call successors, (14) Word has length 74 [2024-09-13 06:27:45,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:45,565 INFO L225 Difference]: With dead ends: 107 [2024-09-13 06:27:45,565 INFO L226 Difference]: Without dead ends: 107 [2024-09-13 06:27:45,566 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=181, Invalid=3479, Unknown=0, NotChecked=0, Total=3660 [2024-09-13 06:27:45,566 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 99 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 2640 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 2662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-13 06:27:45,566 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 249 Invalid, 2662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2640 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-13 06:27:45,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-09-13 06:27:45,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 101. [2024-09-13 06:27:45,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 68 states have internal predecessors, (74), 16 states have call successors, (16), 16 states have call predecessors, (16), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-13 06:27:45,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 106 transitions. [2024-09-13 06:27:45,570 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 106 transitions. Word has length 74 [2024-09-13 06:27:45,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:45,571 INFO L474 AbstractCegarLoop]: Abstraction has 101 states and 106 transitions. [2024-09-13 06:27:45,571 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 23 states have internal predecessors, (43), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (14), 8 states have call predecessors, (14), 4 states have call successors, (14) [2024-09-13 06:27:45,572 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 106 transitions. [2024-09-13 06:27:45,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-09-13 06:27:45,572 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:45,572 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 9, 9, 9, 1, 1, 1, 1] [2024-09-13 06:27:45,590 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 06:27:45,773 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 06:27:45,773 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:45,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:45,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1465007588, now seen corresponding path program 12 times [2024-09-13 06:27:45,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:45,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478763874] [2024-09-13 06:27:45,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:45,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:45,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:46,126 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-13 06:27:46,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:46,252 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:46,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:46,367 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:46,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:46,451 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:46,536 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:46,604 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:46,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:46,663 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:46,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:46,718 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:46,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:46,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:46,810 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 8 proven. 362 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-09-13 06:27:46,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:46,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478763874] [2024-09-13 06:27:46,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478763874] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:46,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052041360] [2024-09-13 06:27:46,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 06:27:46,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:46,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:46,812 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 06:27:46,813 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 06:27:46,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-09-13 06:27:46,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:27:46,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-13 06:27:46,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:47,541 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 62 proven. 60 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2024-09-13 06:27:47,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:27:47,936 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 16 [2024-09-13 06:27:48,290 WARN L176 XnfTransformerHelper]: Simplifying conjunction of 65536 disjunctions. This might take some time... [2024-09-13 06:40:47,692 INFO L192 XnfTransformerHelper]: Simplified to conjunction of 65536 disjunctions. Killed by 15