./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i20_o20-1.c --full-output --witness-type correctness_witness --validate ../results/automizer-verification-files/SV-COMP24_unreach-call/id_i20_o20-1.yml/witness-2.1.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f1d7dc9d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReachWitnessValidation.xml -i ../sv-benchmarks/c/recursive-simple/id_i20_o20-1.c ../results/automizer-verification-files/SV-COMP24_unreach-call/id_i20_o20-1.yml/witness-2.1.yml -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.positions.where.we.compute.the.hoare.annotation None --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-f1d7dc9-m [2024-09-20 13:45:59,942 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 13:46:00,009 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 13:46:00,016 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 13:46:00,017 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 13:46:00,048 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 13:46:00,049 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 13:46:00,050 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 13:46:00,050 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 13:46:00,051 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 13:46:00,051 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 13:46:00,052 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 13:46:00,052 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 13:46:00,053 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 13:46:00,053 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 13:46:00,053 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 13:46:00,054 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 13:46:00,057 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 13:46:00,057 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 13:46:00,058 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 13:46:00,058 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 13:46:00,058 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 13:46:00,059 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 13:46:00,059 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 13:46:00,059 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 13:46:00,060 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 13:46:00,060 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 13:46:00,060 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 13:46:00,060 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 13:46:00,061 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 13:46:00,061 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 13:46:00,061 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 13:46:00,061 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 13:46:00,061 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 13:46:00,062 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 13:46:00,062 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 13:46:00,062 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 13:46:00,062 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 13:46:00,062 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 13:46:00,062 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 13:46:00,063 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 13:46:00,063 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 13:46:00,063 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> None [2024-09-20 13:46:00,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 13:46:00,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 13:46:00,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 13:46:00,377 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-09-20 13:46:00,378 INFO L274 PluginConnector]: Witness Parser initialized [2024-09-20 13:46:00,380 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../results/automizer-verification-files/SV-COMP24_unreach-call/id_i20_o20-1.yml/witness-2.1.yml [2024-09-20 13:46:00,438 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 13:46:00,439 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 13:46:00,439 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive-simple/id_i20_o20-1.c [2024-09-20 13:46:01,875 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 13:46:02,052 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 13:46:02,052 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/id_i20_o20-1.c [2024-09-20 13:46:02,057 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/88ccd971f/e353cf5f3bf747b4bdde03e0a2cc5b99/FLAGd29132387 [2024-09-20 13:46:02,069 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/88ccd971f/e353cf5f3bf747b4bdde03e0a2cc5b99 [2024-09-20 13:46:02,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 13:46:02,070 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-09-20 13:46:02,071 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 13:46:02,071 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 13:46:02,076 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 13:46:02,077 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.09 01:46:00" (1/2) ... [2024-09-20 13:46:02,078 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ad5cf4b and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:46:02, skipping insertion in model container [2024-09-20 13:46:02,078 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.09 01:46:00" (1/2) ... [2024-09-20 13:46:02,079 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2faecaee and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:46:02, skipping insertion in model container [2024-09-20 13:46:02,079 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:46:02" (2/2) ... [2024-09-20 13:46:02,080 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ad5cf4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:46:02, skipping insertion in model container [2024-09-20 13:46:02,080 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:46:02" (2/2) ... [2024-09-20 13:46:02,085 INFO L93 nessWitnessExtractor]: Found the following entries in the witness: [2024-09-20 13:46:02,085 INFO L1541 ArrayList]: Function contract at [L6]: requires null, ensures (((((((((((((((((((((((3 == \result) && (\old(x) == 3)) || ((19 == \result) && (19 == \old(x)))) || ((11 == \result) && (\old(x) == 11))) || ((\old(x) == 6) && (6 == \result))) || ((9 == \result) && (\old(x) == 9))) || ((\old(x) == 17) && (17 == \result))) || ((\old(x) == 18) && (18 == \result))) || ((2 == \result) && (\old(x) == 2))) || (20 < \old(x))) || ((10 == \result) && (\old(x) == 10))) || ((5 == \result) && (5 == \old(x)))) || ((20 == \result) && (\old(x) == 20))) || ((8 == \result) && (\old(x) == 8))) || ((7 == \result) && (7 == \old(x)))) || ((12 == \result) && (\old(x) == 12))) || ((\result == 1) && (\old(x) == 1))) || ((14 == \result) && (\old(x) == 14))) || ((\old(x) == 4) && (4 == \result))) || ((\old(x) == 15) && (15 == \result))) || ((13 == \result) && (\old(x) == 13))) || ((\old(x) == 16) && (16 == \result))) || ((\result == 0) && (\old(x) == 0))) [2024-09-20 13:46:02,097 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 13:46:02,237 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/id_i20_o20-1.c[454,467] [2024-09-20 13:46:02,241 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 13:46:02,256 INFO L200 MainTranslator]: Completed pre-run Start Parsing Global [2024-09-20 13:46:02,310 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/id_i20_o20-1.c[454,467] [2024-09-20 13:46:02,311 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 13:46:02,322 INFO L204 MainTranslator]: Completed translation [2024-09-20 13:46:02,322 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:46:02 WrapperNode [2024-09-20 13:46:02,323 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 13:46:02,323 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 13:46:02,324 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 13:46:02,324 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 13:46:02,330 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:46:02" (1/1) ... [2024-09-20 13:46:02,336 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:46:02" (1/1) ... [2024-09-20 13:46:02,358 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2024-09-20 13:46:02,358 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 13:46:02,359 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 13:46:02,359 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 13:46:02,360 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 13:46:02,369 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:46:02" (1/1) ... [2024-09-20 13:46:02,369 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:46:02" (1/1) ... [2024-09-20 13:46:02,371 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:46:02" (1/1) ... [2024-09-20 13:46:02,379 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 [2024-09-20 13:46:02,379 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:46:02" (1/1) ... [2024-09-20 13:46:02,379 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:46:02" (1/1) ... [2024-09-20 13:46:02,388 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:46:02" (1/1) ... [2024-09-20 13:46:02,389 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:46:02" (1/1) ... [2024-09-20 13:46:02,390 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:46:02" (1/1) ... [2024-09-20 13:46:02,391 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:46:02" (1/1) ... [2024-09-20 13:46:02,394 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 13:46:02,397 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 13:46:02,397 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 13:46:02,397 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 13:46:02,398 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:46:02" (1/1) ... [2024-09-20 13:46:02,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 13:46:02,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:46:02,430 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) [2024-09-20 13:46:02,437 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 [2024-09-20 13:46:02,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 13:46:02,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 13:46:02,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 13:46:02,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-09-20 13:46:02,476 INFO L130 BoogieDeclarations]: Found specification of procedure id [2024-09-20 13:46:02,477 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2024-09-20 13:46:02,525 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 13:46:02,527 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 13:46:02,730 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-20 13:46:02,730 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 13:46:02,756 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 13:46:02,756 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-20 13:46:02,756 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:46:02 BoogieIcfgContainer [2024-09-20 13:46:02,757 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 13:46:02,758 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 13:46:02,759 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 13:46:02,762 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 13:46:02,762 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.09 01:46:00" (1/4) ... [2024-09-20 13:46:02,763 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ad37ac and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.09 01:46:02, skipping insertion in model container [2024-09-20 13:46:02,763 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:46:02" (2/4) ... [2024-09-20 13:46:02,763 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ad37ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:46:02, skipping insertion in model container [2024-09-20 13:46:02,764 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:46:02" (3/4) ... [2024-09-20 13:46:02,764 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ad37ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:46:02, skipping insertion in model container [2024-09-20 13:46:02,764 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:46:02" (4/4) ... [2024-09-20 13:46:02,765 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i20_o20-1.c [2024-09-20 13:46:02,782 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 13:46:02,782 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-09-20 13:46:02,825 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 13:46:02,832 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;@4be9b0a6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 13:46:02,832 INFO L337 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-09-20 13:46:02,836 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) [2024-09-20 13:46:02,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-09-20 13:46:02,843 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:46:02,844 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-09-20 13:46:02,846 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:46:02,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:46:02,853 INFO L85 PathProgramCache]: Analyzing trace with hash 56172024, now seen corresponding path program 1 times [2024-09-20 13:46:02,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:46:02,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014592511] [2024-09-20 13:46:02,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:46:02,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:46:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:03,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:46:03,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:46:03,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014592511] [2024-09-20 13:46:03,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014592511] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:46:03,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:46:03,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-20 13:46:03,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089588057] [2024-09-20 13:46:03,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:46:03,117 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 13:46:03,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:46:03,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 13:46:03,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 13:46:03,148 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) [2024-09-20 13:46:03,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:46:03,234 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2024-09-20 13:46:03,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 13:46:03,237 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 [2024-09-20 13:46:03,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:46:03,244 INFO L225 Difference]: With dead ends: 22 [2024-09-20 13:46:03,244 INFO L226 Difference]: Without dead ends: 20 [2024-09-20 13:46:03,246 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 [2024-09-20 13:46:03,249 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 [2024-09-20 13:46:03,252 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] [2024-09-20 13:46:03,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-09-20 13:46:03,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2024-09-20 13:46:03,280 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) [2024-09-20 13:46:03,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2024-09-20 13:46:03,281 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 5 [2024-09-20 13:46:03,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:46:03,282 INFO L474 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2024-09-20 13:46:03,282 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) [2024-09-20 13:46:03,282 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2024-09-20 13:46:03,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-09-20 13:46:03,283 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:46:03,284 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-09-20 13:46:03,284 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 13:46:03,284 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:46:03,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:46:03,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1615449573, now seen corresponding path program 1 times [2024-09-20 13:46:03,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:46:03,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917373695] [2024-09-20 13:46:03,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:46:03,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:46:03,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:03,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:46:03,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:46:03,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917373695] [2024-09-20 13:46:03,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917373695] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:46:03,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095509857] [2024-09-20 13:46:03,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:46:03,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:46:03,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:46:03,454 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) [2024-09-20 13:46:03,458 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 13:46:03,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:03,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-20 13:46:03,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:46:03,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:46:03,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:46:03,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:46:03,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095509857] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:46:03,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:46:03,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-09-20 13:46:03,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553934283] [2024-09-20 13:46:03,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:46:03,664 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-20 13:46:03,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:46:03,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-20 13:46:03,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-09-20 13:46:03,667 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 12 states, 10 states have (on average 1.1) internal successors, (11), 7 states have internal predecessors, (11), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 13:46:03,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:46:03,850 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2024-09-20 13:46:03,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-20 13:46:03,851 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.1) internal successors, (11), 7 states have internal predecessors, (11), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-09-20 13:46:03,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:46:03,852 INFO L225 Difference]: With dead ends: 41 [2024-09-20 13:46:03,852 INFO L226 Difference]: Without dead ends: 41 [2024-09-20 13:46:03,852 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-09-20 13:46:03,853 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:46:03,854 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 69 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:46:03,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-20 13:46:03,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2024-09-20 13:46:03,864 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) [2024-09-20 13:46:03,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2024-09-20 13:46:03,866 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 8 [2024-09-20 13:46:03,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:46:03,867 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2024-09-20 13:46:03,867 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.1) internal successors, (11), 7 states have internal predecessors, (11), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 13:46:03,868 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2024-09-20 13:46:03,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-20 13:46:03,869 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:46:03,869 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1] [2024-09-20 13:46:03,886 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 13:46:04,073 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 [2024-09-20 13:46:04,074 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:46:04,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:46:04,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1295816760, now seen corresponding path program 2 times [2024-09-20 13:46:04,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:46:04,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348264019] [2024-09-20 13:46:04,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:46:04,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:46:04,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:04,341 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:46:04,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:46:04,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348264019] [2024-09-20 13:46:04,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348264019] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:46:04,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040293425] [2024-09-20 13:46:04,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:46:04,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:46:04,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:46:04,347 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) [2024-09-20 13:46:04,349 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 13:46:04,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-09-20 13:46:04,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:46:04,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 13:46:04,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:46:04,438 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-20 13:46:04,438 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 13:46:04,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040293425] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:46:04,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:46:04,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 15 [2024-09-20 13:46:04,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794308750] [2024-09-20 13:46:04,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:46:04,440 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-20 13:46:04,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:46:04,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-20 13:46:04,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-09-20 13:46:04,442 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) [2024-09-20 13:46:04,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:46:04,476 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2024-09-20 13:46:04,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-20 13:46:04,477 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 [2024-09-20 13:46:04,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:46:04,480 INFO L225 Difference]: With dead ends: 39 [2024-09-20 13:46:04,480 INFO L226 Difference]: Without dead ends: 39 [2024-09-20 13:46:04,480 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-09-20 13:46:04,481 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 [2024-09-20 13:46:04,483 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] [2024-09-20 13:46:04,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-20 13:46:04,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2024-09-20 13:46:04,492 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) [2024-09-20 13:46:04,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2024-09-20 13:46:04,494 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 17 [2024-09-20 13:46:04,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:46:04,494 INFO L474 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2024-09-20 13:46:04,494 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) [2024-09-20 13:46:04,495 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2024-09-20 13:46:04,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-20 13:46:04,495 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:46:04,495 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:46:04,512 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 13:46:04,699 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 [2024-09-20 13:46:04,700 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:46:04,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:46:04,701 INFO L85 PathProgramCache]: Analyzing trace with hash 511038535, now seen corresponding path program 1 times [2024-09-20 13:46:04,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:46:04,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063662525] [2024-09-20 13:46:04,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:46:04,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:46:04,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:04,921 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-20 13:46:04,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:04,987 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:46:04,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:46:04,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063662525] [2024-09-20 13:46:04,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063662525] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:46:04,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339921552] [2024-09-20 13:46:04,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:46:04,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:46:04,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:46:04,992 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) [2024-09-20 13:46:04,995 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 13:46:05,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:05,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-20 13:46:05,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:46:05,114 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:46:05,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:46:05,367 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:46:05,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339921552] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:46:05,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:46:05,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-09-20 13:46:05,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280005666] [2024-09-20 13:46:05,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:46:05,369 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-20 13:46:05,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:46:05,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-20 13:46:05,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2024-09-20 13:46:05,370 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 25 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 16 states have internal predecessors, (28), 10 states have call successors, (10), 9 states have call predecessors, (10), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 13:46:05,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:46:05,824 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2024-09-20 13:46:05,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-20 13:46:05,825 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 16 states have internal predecessors, (28), 10 states have call successors, (10), 9 states have call predecessors, (10), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2024-09-20 13:46:05,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:46:05,827 INFO L225 Difference]: With dead ends: 71 [2024-09-20 13:46:05,827 INFO L226 Difference]: Without dead ends: 71 [2024-09-20 13:46:05,827 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2024-09-20 13:46:05,828 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 125 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 13:46:05,829 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 120 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 13:46:05,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-20 13:46:05,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2024-09-20 13:46:05,839 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) [2024-09-20 13:46:05,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2024-09-20 13:46:05,841 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 20 [2024-09-20 13:46:05,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:46:05,841 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2024-09-20 13:46:05,841 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 16 states have internal predecessors, (28), 10 states have call successors, (10), 9 states have call predecessors, (10), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 13:46:05,841 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2024-09-20 13:46:05,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-20 13:46:05,842 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:46:05,842 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:46:05,855 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-20 13:46:06,043 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 [2024-09-20 13:46:06,043 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:46:06,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:46:06,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1809419033, now seen corresponding path program 2 times [2024-09-20 13:46:06,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:46:06,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611046548] [2024-09-20 13:46:06,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:46:06,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:46:06,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:06,447 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-20 13:46:06,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:06,502 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 1 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:46:06,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:46:06,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611046548] [2024-09-20 13:46:06,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611046548] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:46:06,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713941882] [2024-09-20 13:46:06,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:46:06,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:46:06,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:46:06,506 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) [2024-09-20 13:46:06,509 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 13:46:06,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 13:46:06,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:46:06,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-20 13:46:06,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:46:06,686 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 1 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:46:06,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:46:07,280 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 1 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:46:07,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713941882] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:46:07,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:46:07,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 47 [2024-09-20 13:46:07,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269932562] [2024-09-20 13:46:07,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:46:07,282 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-20 13:46:07,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:46:07,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-20 13:46:07,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=459, Invalid=1703, Unknown=0, NotChecked=0, Total=2162 [2024-09-20 13:46:07,285 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 27 states have internal predecessors, (50), 21 states have call successors, (22), 20 states have call predecessors, (22), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 13:46:08,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:46:08,217 INFO L93 Difference]: Finished difference Result 148 states and 149 transitions. [2024-09-20 13:46:08,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-09-20 13:46:08,219 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 27 states have internal predecessors, (50), 21 states have call successors, (22), 20 states have call predecessors, (22), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2024-09-20 13:46:08,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:46:08,221 INFO L225 Difference]: With dead ends: 148 [2024-09-20 13:46:08,221 INFO L226 Difference]: Without dead ends: 148 [2024-09-20 13:46:08,224 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1129, Invalid=3293, Unknown=0, NotChecked=0, Total=4422 [2024-09-20 13:46:08,225 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 259 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 13:46:08,225 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 228 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 13:46:08,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-09-20 13:46:08,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 129. [2024-09-20 13:46:08,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 87 states have internal predecessors, (106), 21 states have call successors, (21), 20 states have call predecessors, (21), 21 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2024-09-20 13:46:08,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 149 transitions. [2024-09-20 13:46:08,246 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 149 transitions. Word has length 38 [2024-09-20 13:46:08,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:46:08,246 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 149 transitions. [2024-09-20 13:46:08,247 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 27 states have internal predecessors, (50), 21 states have call successors, (22), 20 states have call predecessors, (22), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 13:46:08,247 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 149 transitions. [2024-09-20 13:46:08,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-20 13:46:08,248 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:46:08,249 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:46:08,268 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 13:46:08,452 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 [2024-09-20 13:46:08,453 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:46:08,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:46:08,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1369371833, now seen corresponding path program 3 times [2024-09-20 13:46:08,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:46:08,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715506681] [2024-09-20 13:46:08,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:46:08,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:46:08,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:09,697 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-20 13:46:09,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:09,814 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 0 proven. 611 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:46:09,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:46:09,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715506681] [2024-09-20 13:46:09,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715506681] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:46:09,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288348832] [2024-09-20 13:46:09,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 13:46:09,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:46:09,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:46:09,816 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) [2024-09-20 13:46:09,819 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 13:46:09,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-20 13:46:09,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:46:09,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-20 13:46:09,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:46:09,903 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 57 proven. 1 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2024-09-20 13:46:09,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:46:10,047 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2024-09-20 13:46:10,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288348832] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:46:10,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:46:10,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 5, 6] total 47 [2024-09-20 13:46:10,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885887511] [2024-09-20 13:46:10,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:46:10,049 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-20 13:46:10,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:46:10,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-20 13:46:10,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2024-09-20 13:46:10,052 INFO L87 Difference]: Start difference. First operand 129 states and 149 transitions. Second operand has 48 states, 46 states have (on average 1.173913043478261) internal successors, (54), 28 states have internal predecessors, (54), 24 states have call successors, (25), 21 states have call predecessors, (25), 1 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 13:46:12,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:46:12,544 INFO L93 Difference]: Finished difference Result 215 states and 237 transitions. [2024-09-20 13:46:12,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-20 13:46:12,545 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 1.173913043478261) internal successors, (54), 28 states have internal predecessors, (54), 24 states have call successors, (25), 21 states have call predecessors, (25), 1 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2024-09-20 13:46:12,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:46:12,547 INFO L225 Difference]: With dead ends: 215 [2024-09-20 13:46:12,547 INFO L226 Difference]: Without dead ends: 215 [2024-09-20 13:46:12,548 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=294, Invalid=4536, Unknown=0, NotChecked=0, Total=4830 [2024-09-20 13:46:12,549 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 288 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 5111 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 5280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 5111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-09-20 13:46:12,549 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 871 Invalid, 5280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 5111 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-09-20 13:46:12,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-09-20 13:46:12,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 194. [2024-09-20 13:46:12,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 129 states have (on average 1.317829457364341) internal successors, (170), 130 states have internal predecessors, (170), 22 states have call successors, (22), 21 states have call predecessors, (22), 41 states have return successors, (44), 42 states have call predecessors, (44), 22 states have call successors, (44) [2024-09-20 13:46:12,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 236 transitions. [2024-09-20 13:46:12,568 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 236 transitions. Word has length 68 [2024-09-20 13:46:12,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:46:12,569 INFO L474 AbstractCegarLoop]: Abstraction has 194 states and 236 transitions. [2024-09-20 13:46:12,569 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 1.173913043478261) internal successors, (54), 28 states have internal predecessors, (54), 24 states have call successors, (25), 21 states have call predecessors, (25), 1 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 13:46:12,569 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 236 transitions. [2024-09-20 13:46:12,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-20 13:46:12,570 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:46:12,571 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 2, 2, 2, 1, 1, 1, 1] [2024-09-20 13:46:12,583 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 13:46:12,773 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 [2024-09-20 13:46:12,773 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:46:12,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:46:12,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1356901672, now seen corresponding path program 4 times [2024-09-20 13:46:12,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:46:12,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425818189] [2024-09-20 13:46:12,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:46:12,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:46:12,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:13,812 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-20 13:46:13,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:13,946 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:13,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 1 proven. 613 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 13:46:14,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:46:14,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425818189] [2024-09-20 13:46:14,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425818189] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:46:14,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682597310] [2024-09-20 13:46:14,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 13:46:14,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:46:14,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:46:14,043 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) [2024-09-20 13:46:14,045 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 13:46:14,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 13:46:14,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:46:14,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-20 13:46:14,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:46:14,247 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 90 proven. 5 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2024-09-20 13:46:14,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:46:14,477 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 90 proven. 9 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2024-09-20 13:46:14,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682597310] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:46:14,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:46:14,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 7, 9] total 50 [2024-09-20 13:46:14,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025940447] [2024-09-20 13:46:14,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:46:14,481 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-20 13:46:14,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:46:14,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-20 13:46:14,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2384, Unknown=0, NotChecked=0, Total=2550 [2024-09-20 13:46:14,484 INFO L87 Difference]: Start difference. First operand 194 states and 236 transitions. Second operand has 51 states, 49 states have (on average 1.183673469387755) internal successors, (58), 30 states have internal predecessors, (58), 24 states have call successors, (25), 20 states have call predecessors, (25), 3 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-20 13:46:16,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:46:16,535 INFO L93 Difference]: Finished difference Result 216 states and 238 transitions. [2024-09-20 13:46:16,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-20 13:46:16,536 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 49 states have (on average 1.183673469387755) internal successors, (58), 30 states have internal predecessors, (58), 24 states have call successors, (25), 20 states have call predecessors, (25), 3 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 71 [2024-09-20 13:46:16,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:46:16,537 INFO L225 Difference]: With dead ends: 216 [2024-09-20 13:46:16,539 INFO L226 Difference]: Without dead ends: 216 [2024-09-20 13:46:16,540 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=351, Invalid=5051, Unknown=0, NotChecked=0, Total=5402 [2024-09-20 13:46:16,541 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 294 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 4975 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 5124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 4975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-20 13:46:16,541 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 790 Invalid, 5124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 4975 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-09-20 13:46:16,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2024-09-20 13:46:16,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 197. [2024-09-20 13:46:16,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 131 states have (on average 1.3053435114503817) internal successors, (171), 132 states have internal predecessors, (171), 22 states have call successors, (22), 21 states have call predecessors, (22), 42 states have return successors, (45), 43 states have call predecessors, (45), 22 states have call successors, (45) [2024-09-20 13:46:16,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 238 transitions. [2024-09-20 13:46:16,565 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 238 transitions. Word has length 71 [2024-09-20 13:46:16,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:46:16,565 INFO L474 AbstractCegarLoop]: Abstraction has 197 states and 238 transitions. [2024-09-20 13:46:16,566 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 49 states have (on average 1.183673469387755) internal successors, (58), 30 states have internal predecessors, (58), 24 states have call successors, (25), 20 states have call predecessors, (25), 3 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-20 13:46:16,566 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 238 transitions. [2024-09-20 13:46:16,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-20 13:46:16,571 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:46:16,571 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 3, 3, 3, 1, 1, 1, 1] [2024-09-20 13:46:16,589 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 13:46:16,771 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 [2024-09-20 13:46:16,772 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:46:16,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:46:16,772 INFO L85 PathProgramCache]: Analyzing trace with hash 774477223, now seen corresponding path program 5 times [2024-09-20 13:46:16,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:46:16,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300660416] [2024-09-20 13:46:16,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:46:16,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:46:16,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:17,851 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-20 13:46:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:17,961 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:17,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:18,059 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:18,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:18,155 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 2 proven. 615 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-20 13:46:18,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:46:18,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300660416] [2024-09-20 13:46:18,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300660416] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:46:18,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356071081] [2024-09-20 13:46:18,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 13:46:18,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:46:18,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:46:18,158 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) [2024-09-20 13:46:18,160 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 13:46:18,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2024-09-20 13:46:18,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:46:18,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-09-20 13:46:18,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:46:18,410 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 615 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-20 13:46:18,411 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:46:18,545 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 615 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-20 13:46:18,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356071081] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:46:18,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:46:18,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 44] total 47 [2024-09-20 13:46:18,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616269523] [2024-09-20 13:46:18,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:46:18,547 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-20 13:46:18,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:46:18,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-20 13:46:18,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=2158, Unknown=0, NotChecked=0, Total=2256 [2024-09-20 13:46:18,548 INFO L87 Difference]: Start difference. First operand 197 states and 238 transitions. Second operand has 48 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 28 states have internal predecessors, (52), 21 states have call successors, (21), 19 states have call predecessors, (21), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-20 13:46:20,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:46:20,447 INFO L93 Difference]: Finished difference Result 218 states and 241 transitions. [2024-09-20 13:46:20,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-09-20 13:46:20,448 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 28 states have internal predecessors, (52), 21 states have call successors, (21), 19 states have call predecessors, (21), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 74 [2024-09-20 13:46:20,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:46:20,450 INFO L225 Difference]: With dead ends: 218 [2024-09-20 13:46:20,450 INFO L226 Difference]: Without dead ends: 218 [2024-09-20 13:46:20,451 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=211, Invalid=4759, Unknown=0, NotChecked=0, Total=4970 [2024-09-20 13:46:20,452 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 221 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 5162 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 5214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 5162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-20 13:46:20,452 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 786 Invalid, 5214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 5162 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-20 13:46:20,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-09-20 13:46:20,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 200. [2024-09-20 13:46:20,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 133 states have (on average 1.300751879699248) internal successors, (173), 134 states have internal predecessors, (173), 22 states have call successors, (22), 21 states have call predecessors, (22), 43 states have return successors, (46), 44 states have call predecessors, (46), 22 states have call successors, (46) [2024-09-20 13:46:20,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 241 transitions. [2024-09-20 13:46:20,462 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 241 transitions. Word has length 74 [2024-09-20 13:46:20,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:46:20,463 INFO L474 AbstractCegarLoop]: Abstraction has 200 states and 241 transitions. [2024-09-20 13:46:20,463 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 28 states have internal predecessors, (52), 21 states have call successors, (21), 19 states have call predecessors, (21), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-20 13:46:20,463 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 241 transitions. [2024-09-20 13:46:20,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-20 13:46:20,464 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:46:20,465 INFO L216 NwaCegarLoop]: trace histogram [25, 24, 24, 3, 3, 3, 1, 1, 1, 1] [2024-09-20 13:46:20,481 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-20 13:46:20,665 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 [2024-09-20 13:46:20,666 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:46:20,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:46:20,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1481278311, now seen corresponding path program 6 times [2024-09-20 13:46:20,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:46:20,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871801534] [2024-09-20 13:46:20,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:46:20,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:46:20,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:21,686 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-20 13:46:21,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:21,758 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:21,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:21,800 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:21,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:21,871 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 701 proven. 182 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-20 13:46:21,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:46:21,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871801534] [2024-09-20 13:46:21,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871801534] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:46:21,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478947755] [2024-09-20 13:46:21,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 13:46:21,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:46:21,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:46:21,874 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) [2024-09-20 13:46:21,875 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 13:46:21,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-09-20 13:46:21,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:46:21,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-20 13:46:21,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:46:22,194 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 147 proven. 12 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2024-09-20 13:46:22,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:46:22,440 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 147 proven. 21 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2024-09-20 13:46:22,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478947755] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:46:22,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:46:22,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 9, 12] total 63 [2024-09-20 13:46:22,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957797411] [2024-09-20 13:46:22,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:46:22,442 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-09-20 13:46:22,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:46:22,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-09-20 13:46:22,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=779, Invalid=3127, Unknown=0, NotChecked=0, Total=3906 [2024-09-20 13:46:22,444 INFO L87 Difference]: Start difference. First operand 200 states and 241 transitions. Second operand has 63 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 38 states have internal predecessors, (75), 28 states have call successors, (29), 23 states have call predecessors, (29), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-20 13:46:23,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:46:23,388 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2024-09-20 13:46:23,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2024-09-20 13:46:23,389 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 38 states have internal predecessors, (75), 28 states have call successors, (29), 23 states have call predecessors, (29), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 86 [2024-09-20 13:46:23,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:46:23,390 INFO L225 Difference]: With dead ends: 150 [2024-09-20 13:46:23,390 INFO L226 Difference]: Without dead ends: 147 [2024-09-20 13:46:23,392 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2738 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2931, Invalid=8625, Unknown=0, NotChecked=0, Total=11556 [2024-09-20 13:46:23,393 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 639 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 13:46:23,393 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [640 Valid, 104 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 13:46:23,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-09-20 13:46:23,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 131. [2024-09-20 13:46:23,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 87 states have (on average 1.1954022988505748) internal successors, (104), 88 states have internal predecessors, (104), 21 states have call successors, (21), 21 states have call predecessors, (21), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-20 13:46:23,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 146 transitions. [2024-09-20 13:46:23,398 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 146 transitions. Word has length 86 [2024-09-20 13:46:23,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:46:23,399 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 146 transitions. [2024-09-20 13:46:23,399 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 38 states have internal predecessors, (75), 28 states have call successors, (29), 23 states have call predecessors, (29), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-20 13:46:23,399 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 146 transitions. [2024-09-20 13:46:23,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-09-20 13:46:23,400 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:46:23,400 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 1, 1, 1, 1] [2024-09-20 13:46:23,417 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-20 13:46:23,601 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 [2024-09-20 13:46:23,601 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:46:23,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:46:23,602 INFO L85 PathProgramCache]: Analyzing trace with hash -113365896, now seen corresponding path program 7 times [2024-09-20 13:46:23,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:46:23,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064421637] [2024-09-20 13:46:23,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:46:23,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:46:23,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:24,437 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-20 13:46:24,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:24,559 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:24,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:24,654 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:24,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:24,756 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:24,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:24,852 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 3 proven. 617 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 13:46:24,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:46:24,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064421637] [2024-09-20 13:46:24,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064421637] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:46:24,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428225567] [2024-09-20 13:46:24,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 13:46:24,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:46:24,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:46:24,855 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) [2024-09-20 13:46:24,857 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 13:46:24,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:24,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-09-20 13:46:24,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:46:25,055 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 617 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 13:46:25,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:46:25,196 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 617 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 13:46:25,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428225567] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:46:25,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:46:25,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 46 [2024-09-20 13:46:25,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73334240] [2024-09-20 13:46:25,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:46:25,197 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-20 13:46:25,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:46:25,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-20 13:46:25,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=2068, Unknown=0, NotChecked=0, Total=2162 [2024-09-20 13:46:25,199 INFO L87 Difference]: Start difference. First operand 131 states and 146 transitions. Second operand has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 27 states have internal predecessors, (50), 19 states have call successors, (19), 18 states have call predecessors, (19), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 13:46:27,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:46:27,061 INFO L93 Difference]: Finished difference Result 146 states and 145 transitions. [2024-09-20 13:46:27,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-09-20 13:46:27,062 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 27 states have internal predecessors, (50), 19 states have call successors, (19), 18 states have call predecessors, (19), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 77 [2024-09-20 13:46:27,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:46:27,063 INFO L225 Difference]: With dead ends: 146 [2024-09-20 13:46:27,063 INFO L226 Difference]: Without dead ends: 146 [2024-09-20 13:46:27,064 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=214, Invalid=4898, Unknown=0, NotChecked=0, Total=5112 [2024-09-20 13:46:27,064 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 207 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 4904 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 4953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 4904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-20 13:46:27,065 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 699 Invalid, 4953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 4904 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-20 13:46:27,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-09-20 13:46:27,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 131. [2024-09-20 13:46:27,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 88 states have internal predecessors, (103), 21 states have call successors, (21), 21 states have call predecessors, (21), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-20 13:46:27,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2024-09-20 13:46:27,072 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 77 [2024-09-20 13:46:27,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:46:27,072 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2024-09-20 13:46:27,073 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 27 states have internal predecessors, (50), 19 states have call successors, (19), 18 states have call predecessors, (19), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 13:46:27,073 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2024-09-20 13:46:27,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-20 13:46:27,077 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:46:27,077 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 1, 1, 1, 1] [2024-09-20 13:46:27,089 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-20 13:46:27,277 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 [2024-09-20 13:46:27,278 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:46:27,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:46:27,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1439115257, now seen corresponding path program 8 times [2024-09-20 13:46:27,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:46:27,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866327661] [2024-09-20 13:46:27,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:46:27,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:46:27,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:28,114 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-20 13:46:28,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:28,239 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:28,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:28,336 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:28,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:28,432 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:28,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:28,529 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:28,619 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 4 proven. 619 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-20 13:46:28,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:46:28,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866327661] [2024-09-20 13:46:28,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866327661] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:46:28,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545254338] [2024-09-20 13:46:28,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:46:28,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:46:28,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:46:28,621 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) [2024-09-20 13:46:28,622 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 13:46:28,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 13:46:28,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:46:28,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-09-20 13:46:28,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:46:28,802 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 619 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-20 13:46:28,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:46:28,962 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 619 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-20 13:46:28,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545254338] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:46:28,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:46:28,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 46 [2024-09-20 13:46:28,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657099978] [2024-09-20 13:46:28,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:46:28,963 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-20 13:46:28,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:46:28,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-20 13:46:28,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=2068, Unknown=0, NotChecked=0, Total=2162 [2024-09-20 13:46:28,965 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 27 states have internal predecessors, (50), 18 states have call successors, (18), 17 states have call predecessors, (18), 6 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-20 13:46:30,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:46:30,873 INFO L93 Difference]: Finished difference Result 145 states and 144 transitions. [2024-09-20 13:46:30,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-09-20 13:46:30,874 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 27 states have internal predecessors, (50), 18 states have call successors, (18), 17 states have call predecessors, (18), 6 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) Word has length 80 [2024-09-20 13:46:30,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:46:30,875 INFO L225 Difference]: With dead ends: 145 [2024-09-20 13:46:30,875 INFO L226 Difference]: Without dead ends: 145 [2024-09-20 13:46:30,876 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=217, Invalid=5039, Unknown=0, NotChecked=0, Total=5256 [2024-09-20 13:46:30,877 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 196 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 5052 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 5098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 5052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-20 13:46:30,877 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 642 Invalid, 5098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 5052 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-20 13:46:30,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-09-20 13:46:30,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 131. [2024-09-20 13:46:30,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 87 states have (on average 1.1724137931034482) internal successors, (102), 88 states have internal predecessors, (102), 21 states have call successors, (21), 21 states have call predecessors, (21), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-20 13:46:30,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2024-09-20 13:46:30,881 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 80 [2024-09-20 13:46:30,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:46:30,882 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2024-09-20 13:46:30,882 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 27 states have internal predecessors, (50), 18 states have call successors, (18), 17 states have call predecessors, (18), 6 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-20 13:46:30,882 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2024-09-20 13:46:30,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-09-20 13:46:30,883 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:46:30,883 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 1, 1, 1, 1] [2024-09-20 13:46:30,898 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-20 13:46:31,083 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 [2024-09-20 13:46:31,084 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:46:31,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:46:31,084 INFO L85 PathProgramCache]: Analyzing trace with hash -319074792, now seen corresponding path program 9 times [2024-09-20 13:46:31,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:46:31,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557793664] [2024-09-20 13:46:31,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:46:31,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:46:31,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:31,825 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-20 13:46:31,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:31,975 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:31,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:32,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:32,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:32,200 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:32,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:32,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:32,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:32,360 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:32,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:32,434 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 5 proven. 621 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-20 13:46:32,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:46:32,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557793664] [2024-09-20 13:46:32,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557793664] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:46:32,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787284494] [2024-09-20 13:46:32,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 13:46:32,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:46:32,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:46:32,437 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) [2024-09-20 13:46:32,438 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 13:46:32,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-20 13:46:32,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:46:32,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-20 13:46:32,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:46:32,973 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 182 proven. 51 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked. [2024-09-20 13:46:32,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:46:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 182 proven. 87 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-09-20 13:46:33,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787284494] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:46:33,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:46:33,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 15, 21] total 62 [2024-09-20 13:46:33,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205089195] [2024-09-20 13:46:33,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:46:33,685 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-09-20 13:46:33,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:46:33,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-09-20 13:46:33,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=3652, Unknown=0, NotChecked=0, Total=3906 [2024-09-20 13:46:33,687 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand has 63 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 38 states have internal predecessors, (74), 24 states have call successors, (25), 16 states have call predecessors, (25), 11 states have return successors, (18), 11 states have call predecessors, (18), 9 states have call successors, (18) [2024-09-20 13:46:35,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:46:35,622 INFO L93 Difference]: Finished difference Result 144 states and 143 transitions. [2024-09-20 13:46:35,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-20 13:46:35,623 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 38 states have internal predecessors, (74), 24 states have call successors, (25), 16 states have call predecessors, (25), 11 states have return successors, (18), 11 states have call predecessors, (18), 9 states have call successors, (18) Word has length 83 [2024-09-20 13:46:35,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:46:35,624 INFO L225 Difference]: With dead ends: 144 [2024-09-20 13:46:35,624 INFO L226 Difference]: Without dead ends: 144 [2024-09-20 13:46:35,625 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=579, Invalid=7431, Unknown=0, NotChecked=0, Total=8010 [2024-09-20 13:46:35,626 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 394 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 5028 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 5155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 5028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-20 13:46:35,626 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 542 Invalid, 5155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 5028 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-20 13:46:35,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-09-20 13:46:35,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 131. [2024-09-20 13:46:35,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 87 states have (on average 1.160919540229885) internal successors, (101), 88 states have internal predecessors, (101), 21 states have call successors, (21), 21 states have call predecessors, (21), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-20 13:46:35,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 143 transitions. [2024-09-20 13:46:35,630 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 143 transitions. Word has length 83 [2024-09-20 13:46:35,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:46:35,631 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 143 transitions. [2024-09-20 13:46:35,631 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 38 states have internal predecessors, (74), 24 states have call successors, (25), 16 states have call predecessors, (25), 11 states have return successors, (18), 11 states have call predecessors, (18), 9 states have call successors, (18) [2024-09-20 13:46:35,631 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 143 transitions. [2024-09-20 13:46:35,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-20 13:46:35,632 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:46:35,632 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 7, 7, 7, 1, 1, 1, 1] [2024-09-20 13:46:35,646 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-20 13:46:35,836 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 [2024-09-20 13:46:35,836 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:46:35,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:46:35,837 INFO L85 PathProgramCache]: Analyzing trace with hash -794504601, now seen corresponding path program 10 times [2024-09-20 13:46:35,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:46:35,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362465860] [2024-09-20 13:46:35,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:46:35,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:46:35,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:36,524 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-20 13:46:36,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:36,680 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:36,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:36,815 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:36,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:36,939 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:36,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:37,057 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:37,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:37,149 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:37,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:37,233 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:37,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 6 proven. 623 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-20 13:46:37,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:46:37,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362465860] [2024-09-20 13:46:37,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362465860] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:46:37,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440295204] [2024-09-20 13:46:37,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 13:46:37,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:46:37,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:46:37,315 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) [2024-09-20 13:46:37,316 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-20 13:46:37,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 13:46:37,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:46:37,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-09-20 13:46:37,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:46:37,861 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 195 proven. 70 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2024-09-20 13:46:37,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:46:38,740 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 195 proven. 119 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2024-09-20 13:46:38,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440295204] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:46:38,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:46:38,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 17, 24] total 65 [2024-09-20 13:46:38,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44492798] [2024-09-20 13:46:38,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:46:38,741 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-09-20 13:46:38,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:46:38,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-09-20 13:46:38,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=4019, Unknown=0, NotChecked=0, Total=4290 [2024-09-20 13:46:38,743 INFO L87 Difference]: Start difference. First operand 131 states and 143 transitions. Second operand has 66 states, 64 states have (on average 1.21875) internal successors, (78), 40 states have internal predecessors, (78), 24 states have call successors, (25), 15 states have call predecessors, (25), 13 states have return successors, (21), 13 states have call predecessors, (21), 10 states have call successors, (21) [2024-09-20 13:46:40,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:46:40,716 INFO L93 Difference]: Finished difference Result 143 states and 142 transitions. [2024-09-20 13:46:40,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-20 13:46:40,717 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 64 states have (on average 1.21875) internal successors, (78), 40 states have internal predecessors, (78), 24 states have call successors, (25), 15 states have call predecessors, (25), 13 states have return successors, (21), 13 states have call predecessors, (21), 10 states have call successors, (21) Word has length 86 [2024-09-20 13:46:40,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:46:40,718 INFO L225 Difference]: With dead ends: 143 [2024-09-20 13:46:40,718 INFO L226 Difference]: Without dead ends: 143 [2024-09-20 13:46:40,719 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=636, Invalid=8106, Unknown=0, NotChecked=0, Total=8742 [2024-09-20 13:46:40,719 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 403 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 5324 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 5458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 5324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-20 13:46:40,719 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 507 Invalid, 5458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 5324 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-20 13:46:40,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-09-20 13:46:40,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 131. [2024-09-20 13:46:40,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 88 states have internal predecessors, (100), 21 states have call successors, (21), 21 states have call predecessors, (21), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-20 13:46:40,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 142 transitions. [2024-09-20 13:46:40,723 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 142 transitions. Word has length 86 [2024-09-20 13:46:40,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:46:40,723 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 142 transitions. [2024-09-20 13:46:40,724 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 64 states have (on average 1.21875) internal successors, (78), 40 states have internal predecessors, (78), 24 states have call successors, (25), 15 states have call predecessors, (25), 13 states have return successors, (21), 13 states have call predecessors, (21), 10 states have call successors, (21) [2024-09-20 13:46:40,724 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 142 transitions. [2024-09-20 13:46:40,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-09-20 13:46:40,725 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:46:40,725 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 8, 8, 8, 1, 1, 1, 1] [2024-09-20 13:46:40,739 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-20 13:46:40,925 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 [2024-09-20 13:46:40,925 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:46:40,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:46:40,926 INFO L85 PathProgramCache]: Analyzing trace with hash 478197688, now seen corresponding path program 11 times [2024-09-20 13:46:40,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:46:40,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91399551] [2024-09-20 13:46:40,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:46:40,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:46:40,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:41,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-20 13:46:41,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:41,753 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:41,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:41,891 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:41,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:42,028 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:42,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:42,136 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:42,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:42,231 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:42,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:42,317 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:42,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:42,397 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:42,482 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 7 proven. 625 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-09-20 13:46:42,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:46:42,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91399551] [2024-09-20 13:46:42,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91399551] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:46:42,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223521131] [2024-09-20 13:46:42,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 13:46:42,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:46:42,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:46:42,486 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) [2024-09-20 13:46:42,487 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-20 13:46:42,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2024-09-20 13:46:42,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:46:42,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-09-20 13:46:42,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:46:42,681 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-09-20 13:46:42,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:46:42,923 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-09-20 13:46:42,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223521131] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:46:42,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:46:42,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 46 [2024-09-20 13:46:42,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097114466] [2024-09-20 13:46:42,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:46:42,923 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-20 13:46:42,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:46:42,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-20 13:46:42,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=2068, Unknown=0, NotChecked=0, Total=2162 [2024-09-20 13:46:42,924 INFO L87 Difference]: Start difference. First operand 131 states and 142 transitions. Second operand has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 27 states have internal predecessors, (50), 15 states have call successors, (15), 14 states have call predecessors, (15), 9 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-20 13:46:44,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:46:44,676 INFO L93 Difference]: Finished difference Result 142 states and 141 transitions. [2024-09-20 13:46:44,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-09-20 13:46:44,677 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 27 states have internal predecessors, (50), 15 states have call successors, (15), 14 states have call predecessors, (15), 9 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) Word has length 89 [2024-09-20 13:46:44,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:46:44,677 INFO L225 Difference]: With dead ends: 142 [2024-09-20 13:46:44,677 INFO L226 Difference]: Without dead ends: 142 [2024-09-20 13:46:44,678 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=226, Invalid=5474, Unknown=0, NotChecked=0, Total=5700 [2024-09-20 13:46:44,679 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 166 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 4480 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 4517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 4480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-20 13:46:44,679 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 471 Invalid, 4517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 4480 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-20 13:46:44,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-09-20 13:46:44,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 131. [2024-09-20 13:46:44,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 87 states have (on average 1.1379310344827587) internal successors, (99), 88 states have internal predecessors, (99), 21 states have call successors, (21), 21 states have call predecessors, (21), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-20 13:46:44,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 141 transitions. [2024-09-20 13:46:44,683 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 141 transitions. Word has length 89 [2024-09-20 13:46:44,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:46:44,683 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 141 transitions. [2024-09-20 13:46:44,684 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 27 states have internal predecessors, (50), 15 states have call successors, (15), 14 states have call predecessors, (15), 9 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-20 13:46:44,684 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 141 transitions. [2024-09-20 13:46:44,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-09-20 13:46:44,684 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:46:44,685 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 9, 9, 9, 1, 1, 1, 1] [2024-09-20 13:46:44,702 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-20 13:46:44,888 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 [2024-09-20 13:46:44,889 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:46:44,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:46:44,889 INFO L85 PathProgramCache]: Analyzing trace with hash -419199801, now seen corresponding path program 12 times [2024-09-20 13:46:44,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:46:44,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653889922] [2024-09-20 13:46:44,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:46:44,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:46:44,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:45,497 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-20 13:46:45,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:45,665 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:45,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:45,821 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:45,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:45,955 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:45,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:46,090 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:46,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:46,188 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:46,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:46,285 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:46,372 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:46,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:46,436 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:46:46,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:46,500 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 8 proven. 627 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-09-20 13:46:46,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:46:46,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653889922] [2024-09-20 13:46:46,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653889922] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:46:46,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516030983] [2024-09-20 13:46:46,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 13:46:46,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:46:46,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:46:46,502 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) [2024-09-20 13:46:46,503 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-20 13:46:46,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2024-09-20 13:46:46,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:46:46,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-20 13:46:46,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:46:47,450 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 47 proven. 17 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2024-09-20 13:46:47,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:46:48,138 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 21