./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 de325976 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-de32597-m [2024-09-17 19:53:00,313 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-17 19:53:00,371 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-17 19:53:00,375 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-17 19:53:00,377 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-17 19:53:00,406 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-17 19:53:00,406 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-17 19:53:00,407 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-17 19:53:00,407 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-17 19:53:00,412 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-17 19:53:00,413 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-17 19:53:00,413 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-17 19:53:00,413 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-17 19:53:00,413 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-17 19:53:00,414 INFO L153 SettingsManager]: * Use SBE=true [2024-09-17 19:53:00,414 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-17 19:53:00,414 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-17 19:53:00,414 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-17 19:53:00,415 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-17 19:53:00,415 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-17 19:53:00,415 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-17 19:53:00,421 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-17 19:53:00,421 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-17 19:53:00,422 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-17 19:53:00,422 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-17 19:53:00,422 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-17 19:53:00,422 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-17 19:53:00,422 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-17 19:53:00,422 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-17 19:53:00,423 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-17 19:53:00,423 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-17 19:53:00,423 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-17 19:53:00,423 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 19:53:00,423 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-17 19:53:00,423 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-17 19:53:00,424 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-17 19:53:00,424 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-17 19:53:00,424 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-17 19:53:00,424 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-17 19:53:00,424 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-17 19:53:00,424 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-17 19:53:00,431 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-17 19:53:00,431 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> None [2024-09-17 19:53:00,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-17 19:53:00,695 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-17 19:53:00,698 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-17 19:53:00,698 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-09-17 19:53:00,699 INFO L274 PluginConnector]: Witness Parser initialized [2024-09-17 19:53:00,700 INFO L431 ainManager$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 [2024-09-17 19:53:00,741 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-17 19:53:00,741 INFO L274 PluginConnector]: CDTParser initialized [2024-09-17 19:53:00,741 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive-simple/id_i20_o20-1.c [2024-09-17 19:53:02,044 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-17 19:53:02,201 INFO L384 CDTParser]: Found 1 translation units. [2024-09-17 19:53:02,202 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/id_i20_o20-1.c [2024-09-17 19:53:02,207 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/307539cb7/557db31c174c4b7798f6e6a962815673/FLAG2ebb00d59 [2024-09-17 19:53:02,218 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/307539cb7/557db31c174c4b7798f6e6a962815673 [2024-09-17 19:53:02,219 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-17 19:53:02,220 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-09-17 19:53:02,220 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-17 19:53:02,221 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-17 19:53:02,224 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-17 19:53:02,225 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 17.09 07:53:00" (1/2) ... [2024-09-17 19:53:02,226 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67b3a18d and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 17.09 07:53:02, skipping insertion in model container [2024-09-17 19:53:02,227 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 17.09 07:53:00" (1/2) ... [2024-09-17 19:53:02,228 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@e6daf55 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 17.09 07:53:02, skipping insertion in model container [2024-09-17 19:53:02,229 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 07:53:02" (2/2) ... [2024-09-17 19:53:02,229 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67b3a18d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:53:02, skipping insertion in model container [2024-09-17 19:53:02,229 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 07:53:02" (2/2) ... [2024-09-17 19:53:02,234 INFO L93 nessWitnessExtractor]: Found the following entries in the witness: [2024-09-17 19:53:02,236 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))) [2024-09-17 19:53:02,250 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-17 19:53:02,368 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] [2024-09-17 19:53:02,392 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 19:53:02,401 INFO L200 MainTranslator]: Completed pre-run Start Parsing Global [2024-09-17 19:53:02,446 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] [2024-09-17 19:53:02,447 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 19:53:02,457 INFO L204 MainTranslator]: Completed translation [2024-09-17 19:53:02,458 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:53:02 WrapperNode [2024-09-17 19:53:02,458 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-17 19:53:02,459 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-17 19:53:02,459 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-17 19:53:02,459 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-17 19:53:02,464 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:53:02" (1/1) ... [2024-09-17 19:53:02,468 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:53:02" (1/1) ... [2024-09-17 19:53:02,479 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2024-09-17 19:53:02,479 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-17 19:53:02,479 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-17 19:53:02,479 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-17 19:53:02,479 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-17 19:53:02,487 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:53:02" (1/1) ... [2024-09-17 19:53:02,487 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:53:02" (1/1) ... [2024-09-17 19:53:02,489 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:53:02" (1/1) ... [2024-09-17 19:53:02,495 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 [2024-09-17 19:53:02,495 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:53:02" (1/1) ... [2024-09-17 19:53:02,496 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:53:02" (1/1) ... [2024-09-17 19:53:02,499 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:53:02" (1/1) ... [2024-09-17 19:53:02,501 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:53:02" (1/1) ... [2024-09-17 19:53:02,502 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:53:02" (1/1) ... [2024-09-17 19:53:02,505 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:53:02" (1/1) ... [2024-09-17 19:53:02,507 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-17 19:53:02,507 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-17 19:53:02,507 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-17 19:53:02,508 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-17 19:53:02,508 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:53:02" (1/1) ... [2024-09-17 19:53:02,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 19:53:02,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:53:02,533 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) [2024-09-17 19:53:02,534 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 [2024-09-17 19:53:02,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-17 19:53:02,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-17 19:53:02,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-17 19:53:02,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-09-17 19:53:02,567 INFO L130 BoogieDeclarations]: Found specification of procedure id [2024-09-17 19:53:02,568 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2024-09-17 19:53:02,626 INFO L242 CfgBuilder]: Building ICFG [2024-09-17 19:53:02,628 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-17 19:53:02,757 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-17 19:53:02,757 INFO L291 CfgBuilder]: Performing block encoding [2024-09-17 19:53:02,771 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-17 19:53:02,771 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-17 19:53:02,771 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 07:53:02 BoogieIcfgContainer [2024-09-17 19:53:02,771 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-17 19:53:02,773 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-17 19:53:02,773 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-17 19:53:02,775 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-17 19:53:02,775 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 17.09 07:53:00" (1/4) ... [2024-09-17 19:53:02,776 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c6243ee and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 17.09 07:53:02, skipping insertion in model container [2024-09-17 19:53:02,776 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 07:53:02" (2/4) ... [2024-09-17 19:53:02,776 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c6243ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 07:53:02, skipping insertion in model container [2024-09-17 19:53:02,776 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:53:02" (3/4) ... [2024-09-17 19:53:02,777 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c6243ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 07:53:02, skipping insertion in model container [2024-09-17 19:53:02,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 07:53:02" (4/4) ... [2024-09-17 19:53:02,777 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i20_o20-1.c [2024-09-17 19:53:02,789 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-17 19:53:02,789 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-09-17 19:53:02,819 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-17 19:53:02,824 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;@372edd65, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-17 19:53:02,824 INFO L337 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-09-17 19:53:02,826 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) [2024-09-17 19:53:02,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-09-17 19:53:02,831 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:53:02,831 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-09-17 19:53:02,832 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:53:02,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:53:02,836 INFO L85 PathProgramCache]: Analyzing trace with hash 56172024, now seen corresponding path program 1 times [2024-09-17 19:53:02,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:53:02,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117018314] [2024-09-17 19:53:02,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:53:02,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:53:02,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:03,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:53:03,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:53:03,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117018314] [2024-09-17 19:53:03,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117018314] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:53:03,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 19:53:03,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-17 19:53:03,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041110982] [2024-09-17 19:53:03,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:53:03,034 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 19:53:03,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:53:03,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 19:53:03,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 19:53:03,064 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) [2024-09-17 19:53:03,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:53:03,123 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2024-09-17 19:53:03,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 19:53:03,125 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 [2024-09-17 19:53:03,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:53:03,130 INFO L225 Difference]: With dead ends: 22 [2024-09-17 19:53:03,130 INFO L226 Difference]: Without dead ends: 20 [2024-09-17 19:53:03,132 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 [2024-09-17 19:53:03,134 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 [2024-09-17 19:53:03,135 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] [2024-09-17 19:53:03,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-09-17 19:53:03,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2024-09-17 19:53:03,158 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) [2024-09-17 19:53:03,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2024-09-17 19:53:03,159 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 5 [2024-09-17 19:53:03,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:53:03,160 INFO L474 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2024-09-17 19:53:03,160 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) [2024-09-17 19:53:03,160 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2024-09-17 19:53:03,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-09-17 19:53:03,161 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:53:03,161 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-09-17 19:53:03,161 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-17 19:53:03,162 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:53:03,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:53:03,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1615449573, now seen corresponding path program 1 times [2024-09-17 19:53:03,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:53:03,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764331287] [2024-09-17 19:53:03,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:53:03,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:53:03,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:03,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:53:03,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:53:03,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764331287] [2024-09-17 19:53:03,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764331287] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:53:03,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267000070] [2024-09-17 19:53:03,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:53:03,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:53:03,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:53:03,269 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) [2024-09-17 19:53:03,271 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-17 19:53:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:03,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-17 19:53:03,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:53:03,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:53:03,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:53:03,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:53:03,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267000070] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:53:03,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:53:03,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-09-17 19:53:03,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254222058] [2024-09-17 19:53:03,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:53:03,429 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-17 19:53:03,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:53:03,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-17 19:53:03,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-09-17 19:53:03,431 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) [2024-09-17 19:53:03,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:53:03,581 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2024-09-17 19:53:03,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-17 19:53:03,583 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 [2024-09-17 19:53:03,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:53:03,584 INFO L225 Difference]: With dead ends: 41 [2024-09-17 19:53:03,584 INFO L226 Difference]: Without dead ends: 41 [2024-09-17 19:53:03,585 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 [2024-09-17 19:53:03,585 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 [2024-09-17 19:53:03,586 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] [2024-09-17 19:53:03,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-17 19:53:03,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2024-09-17 19:53:03,593 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) [2024-09-17 19:53:03,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2024-09-17 19:53:03,594 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 8 [2024-09-17 19:53:03,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:53:03,595 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2024-09-17 19:53:03,595 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) [2024-09-17 19:53:03,595 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2024-09-17 19:53:03,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-17 19:53:03,597 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:53:03,597 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1] [2024-09-17 19:53:03,611 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-17 19:53:03,801 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 [2024-09-17 19:53:03,802 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:53:03,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:53:03,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1295816760, now seen corresponding path program 2 times [2024-09-17 19:53:03,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:53:03,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049395139] [2024-09-17 19:53:03,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:53:03,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:53:03,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:04,022 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:53:04,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:53:04,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049395139] [2024-09-17 19:53:04,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049395139] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:53:04,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917076654] [2024-09-17 19:53:04,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 19:53:04,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:53:04,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:53:04,029 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) [2024-09-17 19:53:04,034 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-17 19:53:04,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-09-17 19:53:04,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:53:04,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-17 19:53:04,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:53:04,104 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-17 19:53:04,105 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 19:53:04,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917076654] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:53:04,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-17 19:53:04,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 15 [2024-09-17 19:53:04,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659911027] [2024-09-17 19:53:04,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:53:04,106 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-17 19:53:04,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:53:04,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-17 19:53:04,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-09-17 19:53:04,106 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) [2024-09-17 19:53:04,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:53:04,137 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2024-09-17 19:53:04,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-17 19:53:04,138 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 [2024-09-17 19:53:04,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:53:04,140 INFO L225 Difference]: With dead ends: 39 [2024-09-17 19:53:04,140 INFO L226 Difference]: Without dead ends: 39 [2024-09-17 19:53:04,140 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 [2024-09-17 19:53:04,142 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 [2024-09-17 19:53:04,143 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] [2024-09-17 19:53:04,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-17 19:53:04,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2024-09-17 19:53:04,147 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) [2024-09-17 19:53:04,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2024-09-17 19:53:04,148 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 17 [2024-09-17 19:53:04,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:53:04,148 INFO L474 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2024-09-17 19:53:04,149 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) [2024-09-17 19:53:04,149 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2024-09-17 19:53:04,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-17 19:53:04,149 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:53:04,149 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:53:04,162 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-17 19:53:04,353 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 [2024-09-17 19:53:04,356 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:53:04,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:53:04,360 INFO L85 PathProgramCache]: Analyzing trace with hash 511038535, now seen corresponding path program 1 times [2024-09-17 19:53:04,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:53:04,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990563854] [2024-09-17 19:53:04,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:53:04,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:53:04,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:04,513 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-17 19:53:04,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:04,571 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:53:04,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:53:04,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990563854] [2024-09-17 19:53:04,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990563854] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:53:04,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544968925] [2024-09-17 19:53:04,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:53:04,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:53:04,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:53:04,574 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) [2024-09-17 19:53:04,587 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-17 19:53:04,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:04,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-17 19:53:04,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:53:04,681 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:53:04,682 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:53:04,865 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:53:04,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544968925] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:53:04,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:53:04,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-09-17 19:53:04,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451824516] [2024-09-17 19:53:04,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:53:04,866 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-17 19:53:04,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:53:04,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-17 19:53:04,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2024-09-17 19:53:04,867 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) [2024-09-17 19:53:05,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:53:05,180 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2024-09-17 19:53:05,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-17 19:53:05,180 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 [2024-09-17 19:53:05,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:53:05,181 INFO L225 Difference]: With dead ends: 71 [2024-09-17 19:53:05,181 INFO L226 Difference]: Without dead ends: 71 [2024-09-17 19:53:05,182 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2024-09-17 19:53:05,183 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 125 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 19:53:05,183 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 120 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 19:53:05,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-17 19:53:05,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2024-09-17 19:53:05,190 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) [2024-09-17 19:53:05,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2024-09-17 19:53:05,191 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 20 [2024-09-17 19:53:05,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:53:05,194 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2024-09-17 19:53:05,194 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) [2024-09-17 19:53:05,194 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2024-09-17 19:53:05,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-17 19:53:05,195 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:53:05,195 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:53:05,207 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-17 19:53:05,395 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 [2024-09-17 19:53:05,396 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:53:05,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:53:05,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1809419033, now seen corresponding path program 2 times [2024-09-17 19:53:05,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:53:05,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997125077] [2024-09-17 19:53:05,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:53:05,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:53:05,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:05,802 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-17 19:53:05,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:05,878 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 1 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:53:05,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:53:05,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997125077] [2024-09-17 19:53:05,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997125077] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:53:05,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128482746] [2024-09-17 19:53:05,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 19:53:05,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:53:05,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:53:05,881 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) [2024-09-17 19:53:05,886 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-17 19:53:05,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 19:53:05,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:53:05,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-17 19:53:05,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:53:06,080 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 1 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:53:06,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:53:06,624 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 1 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:53:06,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128482746] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:53:06,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:53:06,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 47 [2024-09-17 19:53:06,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201088563] [2024-09-17 19:53:06,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:53:06,626 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-17 19:53:06,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:53:06,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-17 19:53:06,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=459, Invalid=1703, Unknown=0, NotChecked=0, Total=2162 [2024-09-17 19:53:06,628 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) [2024-09-17 19:53:07,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:53:07,392 INFO L93 Difference]: Finished difference Result 148 states and 149 transitions. [2024-09-17 19:53:07,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-09-17 19:53:07,392 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 [2024-09-17 19:53:07,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:53:07,394 INFO L225 Difference]: With dead ends: 148 [2024-09-17 19:53:07,394 INFO L226 Difference]: Without dead ends: 148 [2024-09-17 19:53:07,395 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 [2024-09-17 19:53:07,396 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 259 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-17 19:53:07,397 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 228 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-17 19:53:07,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-09-17 19:53:07,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 129. [2024-09-17 19:53:07,404 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) [2024-09-17 19:53:07,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 149 transitions. [2024-09-17 19:53:07,406 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 149 transitions. Word has length 38 [2024-09-17 19:53:07,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:53:07,406 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 149 transitions. [2024-09-17 19:53:07,406 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) [2024-09-17 19:53:07,406 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 149 transitions. [2024-09-17 19:53:07,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-17 19:53:07,407 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:53:07,407 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:53:07,432 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-17 19:53:07,608 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 [2024-09-17 19:53:07,608 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:53:07,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:53:07,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1369371833, now seen corresponding path program 3 times [2024-09-17 19:53:07,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:53:07,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466621653] [2024-09-17 19:53:07,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:53:07,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:53:07,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:08,722 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-17 19:53:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:08,869 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 0 proven. 611 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:53:08,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:53:08,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466621653] [2024-09-17 19:53:08,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466621653] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:53:08,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713579505] [2024-09-17 19:53:08,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 19:53:08,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:53:08,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:53:08,872 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) [2024-09-17 19:53:08,873 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-17 19:53:08,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-17 19:53:08,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:53:08,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-17 19:53:08,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:53:08,942 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 57 proven. 1 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2024-09-17 19:53:08,942 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:53:09,121 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2024-09-17 19:53:09,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713579505] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:53:09,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:53:09,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 5, 6] total 47 [2024-09-17 19:53:09,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000439054] [2024-09-17 19:53:09,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:53:09,122 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-17 19:53:09,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:53:09,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-17 19:53:09,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2024-09-17 19:53:09,124 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) [2024-09-17 19:53:11,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:53:11,353 INFO L93 Difference]: Finished difference Result 215 states and 237 transitions. [2024-09-17 19:53:11,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-17 19:53:11,354 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 [2024-09-17 19:53:11,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:53:11,355 INFO L225 Difference]: With dead ends: 215 [2024-09-17 19:53:11,355 INFO L226 Difference]: Without dead ends: 215 [2024-09-17 19:53:11,357 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 [2024-09-17 19:53:11,358 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 288 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 5111 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.7s IncrementalHoareTripleChecker+Time [2024-09-17 19:53:11,358 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 871 Invalid, 5280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 5111 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-17 19:53:11,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-09-17 19:53:11,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 194. [2024-09-17 19:53:11,368 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) [2024-09-17 19:53:11,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 236 transitions. [2024-09-17 19:53:11,370 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 236 transitions. Word has length 68 [2024-09-17 19:53:11,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:53:11,370 INFO L474 AbstractCegarLoop]: Abstraction has 194 states and 236 transitions. [2024-09-17 19:53:11,370 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) [2024-09-17 19:53:11,370 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 236 transitions. [2024-09-17 19:53:11,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-17 19:53:11,372 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:53:11,372 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 2, 2, 2, 1, 1, 1, 1] [2024-09-17 19:53:11,387 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-17 19:53:11,576 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 [2024-09-17 19:53:11,577 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:53:11,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:53:11,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1356901672, now seen corresponding path program 4 times [2024-09-17 19:53:11,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:53:11,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727605922] [2024-09-17 19:53:11,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:53:11,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:53:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:12,402 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-17 19:53:12,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:12,484 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:12,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:12,554 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 1 proven. 613 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 19:53:12,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:53:12,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727605922] [2024-09-17 19:53:12,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727605922] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:53:12,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535256798] [2024-09-17 19:53:12,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 19:53:12,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:53:12,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:53:12,556 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) [2024-09-17 19:53:12,557 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-17 19:53:12,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 19:53:12,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:53:12,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-17 19:53:12,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:53:12,683 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 90 proven. 5 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2024-09-17 19:53:12,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:53:12,864 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 90 proven. 9 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2024-09-17 19:53:12,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535256798] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:53:12,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:53:12,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 7, 9] total 50 [2024-09-17 19:53:12,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885100190] [2024-09-17 19:53:12,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:53:12,866 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-17 19:53:12,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:53:12,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-17 19:53:12,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2384, Unknown=0, NotChecked=0, Total=2550 [2024-09-17 19:53:12,869 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) [2024-09-17 19:53:14,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:53:14,788 INFO L93 Difference]: Finished difference Result 216 states and 238 transitions. [2024-09-17 19:53:14,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-17 19:53:14,788 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 [2024-09-17 19:53:14,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:53:14,790 INFO L225 Difference]: With dead ends: 216 [2024-09-17 19:53:14,790 INFO L226 Difference]: Without dead ends: 216 [2024-09-17 19:53:14,791 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=351, Invalid=5051, Unknown=0, NotChecked=0, Total=5402 [2024-09-17 19:53:14,791 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 294 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 4975 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.5s IncrementalHoareTripleChecker+Time [2024-09-17 19:53:14,791 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 790 Invalid, 5124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 4975 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-17 19:53:14,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2024-09-17 19:53:14,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 197. [2024-09-17 19:53:14,800 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) [2024-09-17 19:53:14,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 238 transitions. [2024-09-17 19:53:14,802 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 238 transitions. Word has length 71 [2024-09-17 19:53:14,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:53:14,802 INFO L474 AbstractCegarLoop]: Abstraction has 197 states and 238 transitions. [2024-09-17 19:53:14,803 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) [2024-09-17 19:53:14,803 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 238 transitions. [2024-09-17 19:53:14,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-17 19:53:14,804 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:53:14,804 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 3, 3, 3, 1, 1, 1, 1] [2024-09-17 19:53:14,816 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-17 19:53:15,008 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 [2024-09-17 19:53:15,009 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:53:15,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:53:15,010 INFO L85 PathProgramCache]: Analyzing trace with hash 774477223, now seen corresponding path program 5 times [2024-09-17 19:53:15,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:53:15,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968424627] [2024-09-17 19:53:15,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:53:15,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:53:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:16,127 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-17 19:53:16,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:16,262 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:16,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:16,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:16,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:16,474 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 2 proven. 615 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-17 19:53:16,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:53:16,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968424627] [2024-09-17 19:53:16,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968424627] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:53:16,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267711947] [2024-09-17 19:53:16,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 19:53:16,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:53:16,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:53:16,477 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) [2024-09-17 19:53:16,478 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-17 19:53:16,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2024-09-17 19:53:16,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:53:16,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-09-17 19:53:16,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:53:16,700 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 615 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-17 19:53:16,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:53:16,827 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 615 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-17 19:53:16,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267711947] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:53:16,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:53:16,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 44] total 47 [2024-09-17 19:53:16,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745604068] [2024-09-17 19:53:16,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:53:16,828 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-17 19:53:16,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:53:16,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-17 19:53:16,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=2158, Unknown=0, NotChecked=0, Total=2256 [2024-09-17 19:53:16,829 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) [2024-09-17 19:53:18,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:53:18,552 INFO L93 Difference]: Finished difference Result 218 states and 241 transitions. [2024-09-17 19:53:18,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-09-17 19:53:18,552 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 [2024-09-17 19:53:18,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:53:18,555 INFO L225 Difference]: With dead ends: 218 [2024-09-17 19:53:18,555 INFO L226 Difference]: Without dead ends: 218 [2024-09-17 19:53:18,556 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 [2024-09-17 19:53:18,561 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, 1.4s IncrementalHoareTripleChecker+Time [2024-09-17 19:53:18,561 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 786 Invalid, 5214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 5162 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-17 19:53:18,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-09-17 19:53:18,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 200. [2024-09-17 19:53:18,579 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) [2024-09-17 19:53:18,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 241 transitions. [2024-09-17 19:53:18,584 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 241 transitions. Word has length 74 [2024-09-17 19:53:18,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:53:18,585 INFO L474 AbstractCegarLoop]: Abstraction has 200 states and 241 transitions. [2024-09-17 19:53:18,585 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) [2024-09-17 19:53:18,585 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 241 transitions. [2024-09-17 19:53:18,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-17 19:53:18,592 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:53:18,592 INFO L216 NwaCegarLoop]: trace histogram [25, 24, 24, 3, 3, 3, 1, 1, 1, 1] [2024-09-17 19:53:18,613 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-17 19:53:18,793 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 [2024-09-17 19:53:18,793 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:53:18,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:53:18,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1481278311, now seen corresponding path program 6 times [2024-09-17 19:53:18,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:53:18,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307243744] [2024-09-17 19:53:18,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:53:18,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:53:18,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:19,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-17 19:53:19,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:19,835 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:19,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:19,870 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:19,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:19,924 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 701 proven. 182 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-17 19:53:19,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:53:19,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307243744] [2024-09-17 19:53:19,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307243744] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:53:19,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189141464] [2024-09-17 19:53:19,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 19:53:19,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:53:19,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:53:19,926 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) [2024-09-17 19:53:19,932 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-17 19:53:19,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-09-17 19:53:19,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:53:19,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-17 19:53:19,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:53:20,225 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 147 proven. 12 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2024-09-17 19:53:20,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:53:20,451 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 147 proven. 21 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2024-09-17 19:53:20,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189141464] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:53:20,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:53:20,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 9, 12] total 63 [2024-09-17 19:53:20,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123072389] [2024-09-17 19:53:20,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:53:20,453 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-09-17 19:53:20,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:53:20,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-09-17 19:53:20,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=779, Invalid=3127, Unknown=0, NotChecked=0, Total=3906 [2024-09-17 19:53:20,454 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) [2024-09-17 19:53:21,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:53:21,422 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2024-09-17 19:53:21,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2024-09-17 19:53:21,422 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 [2024-09-17 19:53:21,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:53:21,423 INFO L225 Difference]: With dead ends: 150 [2024-09-17 19:53:21,423 INFO L226 Difference]: Without dead ends: 147 [2024-09-17 19:53:21,426 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 [2024-09-17 19:53:21,426 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 639 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2024-09-17 19:53:21,427 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] [2024-09-17 19:53:21,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-09-17 19:53:21,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 131. [2024-09-17 19:53:21,431 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) [2024-09-17 19:53:21,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 146 transitions. [2024-09-17 19:53:21,431 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 146 transitions. Word has length 86 [2024-09-17 19:53:21,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:53:21,432 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 146 transitions. [2024-09-17 19:53:21,432 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) [2024-09-17 19:53:21,432 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 146 transitions. [2024-09-17 19:53:21,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-09-17 19:53:21,433 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:53:21,433 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 1, 1, 1, 1] [2024-09-17 19:53:21,448 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-17 19:53:21,637 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 [2024-09-17 19:53:21,638 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:53:21,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:53:21,638 INFO L85 PathProgramCache]: Analyzing trace with hash -113365896, now seen corresponding path program 7 times [2024-09-17 19:53:21,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:53:21,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721527652] [2024-09-17 19:53:21,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:53:21,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:53:21,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:22,428 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-17 19:53:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:22,527 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:22,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:22,602 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:22,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:22,678 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:22,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 3 proven. 617 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 19:53:22,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:53:22,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721527652] [2024-09-17 19:53:22,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721527652] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:53:22,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471731041] [2024-09-17 19:53:22,746 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 19:53:22,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:53:22,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:53:22,749 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) [2024-09-17 19:53:22,753 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-17 19:53:22,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:22,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-09-17 19:53:22,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:53:22,958 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 617 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-17 19:53:22,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:53:23,083 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 617 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-17 19:53:23,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471731041] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:53:23,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:53:23,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 46 [2024-09-17 19:53:23,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636479006] [2024-09-17 19:53:23,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:53:23,084 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-17 19:53:23,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:53:23,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-17 19:53:23,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=2068, Unknown=0, NotChecked=0, Total=2162 [2024-09-17 19:53:23,086 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) [2024-09-17 19:53:25,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:53:25,006 INFO L93 Difference]: Finished difference Result 146 states and 145 transitions. [2024-09-17 19:53:25,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-09-17 19:53:25,006 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 [2024-09-17 19:53:25,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:53:25,007 INFO L225 Difference]: With dead ends: 146 [2024-09-17 19:53:25,007 INFO L226 Difference]: Without dead ends: 146 [2024-09-17 19:53:25,008 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=214, Invalid=4898, Unknown=0, NotChecked=0, Total=5112 [2024-09-17 19:53:25,009 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 [2024-09-17 19:53:25,009 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] [2024-09-17 19:53:25,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-09-17 19:53:25,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 131. [2024-09-17 19:53:25,012 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) [2024-09-17 19:53:25,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2024-09-17 19:53:25,013 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 77 [2024-09-17 19:53:25,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:53:25,013 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2024-09-17 19:53:25,013 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) [2024-09-17 19:53:25,013 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2024-09-17 19:53:25,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-17 19:53:25,014 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:53:25,014 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 1, 1, 1, 1] [2024-09-17 19:53:25,026 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-17 19:53:25,215 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 [2024-09-17 19:53:25,215 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:53:25,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:53:25,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1439115257, now seen corresponding path program 8 times [2024-09-17 19:53:25,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:53:25,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710330293] [2024-09-17 19:53:25,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:53:25,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:53:25,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:25,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-17 19:53:25,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:26,014 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:26,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:26,153 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:26,237 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:26,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:26,300 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:26,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:26,370 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 4 proven. 619 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-17 19:53:26,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:53:26,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710330293] [2024-09-17 19:53:26,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710330293] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:53:26,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378658129] [2024-09-17 19:53:26,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 19:53:26,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:53:26,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:53:26,372 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) [2024-09-17 19:53:26,377 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-17 19:53:26,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 19:53:26,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:53:26,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-09-17 19:53:26,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:53:26,539 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 619 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-17 19:53:26,539 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:53:26,672 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 619 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-17 19:53:26,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378658129] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:53:26,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:53:26,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 46 [2024-09-17 19:53:26,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943997201] [2024-09-17 19:53:26,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:53:26,673 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-17 19:53:26,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:53:26,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-17 19:53:26,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=2068, Unknown=0, NotChecked=0, Total=2162 [2024-09-17 19:53:26,674 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) [2024-09-17 19:53:28,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:53:28,677 INFO L93 Difference]: Finished difference Result 145 states and 144 transitions. [2024-09-17 19:53:28,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-09-17 19:53:28,678 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 [2024-09-17 19:53:28,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:53:28,679 INFO L225 Difference]: With dead ends: 145 [2024-09-17 19:53:28,679 INFO L226 Difference]: Without dead ends: 145 [2024-09-17 19:53:28,680 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=217, Invalid=5039, Unknown=0, NotChecked=0, Total=5256 [2024-09-17 19:53:28,681 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 196 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 5052 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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 [2024-09-17 19:53:28,681 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] [2024-09-17 19:53:28,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-09-17 19:53:28,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 131. [2024-09-17 19:53:28,686 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) [2024-09-17 19:53:28,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2024-09-17 19:53:28,687 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 80 [2024-09-17 19:53:28,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:53:28,688 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2024-09-17 19:53:28,688 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) [2024-09-17 19:53:28,688 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2024-09-17 19:53:28,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-09-17 19:53:28,689 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:53:28,692 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 1, 1, 1, 1] [2024-09-17 19:53:28,704 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-17 19:53:28,892 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 [2024-09-17 19:53:28,893 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:53:28,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:53:28,893 INFO L85 PathProgramCache]: Analyzing trace with hash -319074792, now seen corresponding path program 9 times [2024-09-17 19:53:28,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:53:28,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807042501] [2024-09-17 19:53:28,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:53:28,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:53:28,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:29,545 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-17 19:53:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:29,668 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:29,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:29,770 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:29,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:29,886 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:29,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:29,970 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:29,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:30,026 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:30,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:30,104 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 5 proven. 621 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-17 19:53:30,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:53:30,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807042501] [2024-09-17 19:53:30,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807042501] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:53:30,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013296957] [2024-09-17 19:53:30,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 19:53:30,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:53:30,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:53:30,106 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) [2024-09-17 19:53:30,107 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-17 19:53:30,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-17 19:53:30,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:53:30,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-17 19:53:30,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:53:30,556 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 182 proven. 51 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked. [2024-09-17 19:53:30,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:53:31,196 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 182 proven. 87 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-09-17 19:53:31,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013296957] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:53:31,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:53:31,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 15, 21] total 62 [2024-09-17 19:53:31,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224896592] [2024-09-17 19:53:31,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:53:31,197 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-09-17 19:53:31,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:53:31,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-09-17 19:53:31,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=3652, Unknown=0, NotChecked=0, Total=3906 [2024-09-17 19:53:31,198 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) [2024-09-17 19:53:33,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:53:33,190 INFO L93 Difference]: Finished difference Result 144 states and 143 transitions. [2024-09-17 19:53:33,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-17 19:53:33,190 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 [2024-09-17 19:53:33,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:53:33,191 INFO L225 Difference]: With dead ends: 144 [2024-09-17 19:53:33,191 INFO L226 Difference]: Without dead ends: 144 [2024-09-17 19:53:33,193 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 [2024-09-17 19:53:33,193 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, 1.5s IncrementalHoareTripleChecker+Time [2024-09-17 19:53:33,194 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 542 Invalid, 5155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 5028 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-17 19:53:33,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-09-17 19:53:33,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 131. [2024-09-17 19:53:33,196 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) [2024-09-17 19:53:33,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 143 transitions. [2024-09-17 19:53:33,197 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 143 transitions. Word has length 83 [2024-09-17 19:53:33,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:53:33,197 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 143 transitions. [2024-09-17 19:53:33,197 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) [2024-09-17 19:53:33,197 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 143 transitions. [2024-09-17 19:53:33,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-17 19:53:33,198 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:53:33,198 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 7, 7, 7, 1, 1, 1, 1] [2024-09-17 19:53:33,213 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-17 19:53:33,402 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 [2024-09-17 19:53:33,402 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:53:33,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:53:33,403 INFO L85 PathProgramCache]: Analyzing trace with hash -794504601, now seen corresponding path program 10 times [2024-09-17 19:53:33,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:53:33,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454981048] [2024-09-17 19:53:33,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:53:33,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:53:33,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:33,975 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-17 19:53:33,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:34,083 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:34,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:34,177 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:34,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:34,260 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:34,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:34,351 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:34,418 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:34,481 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:34,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:34,547 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 6 proven. 623 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-17 19:53:34,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:53:34,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454981048] [2024-09-17 19:53:34,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454981048] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:53:34,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997765478] [2024-09-17 19:53:34,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 19:53:34,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:53:34,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:53:34,549 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) [2024-09-17 19:53:34,554 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-17 19:53:34,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 19:53:34,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:53:34,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-09-17 19:53:34,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:53:35,040 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 195 proven. 70 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2024-09-17 19:53:35,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:53:35,855 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 195 proven. 119 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2024-09-17 19:53:35,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997765478] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:53:35,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:53:35,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 17, 24] total 65 [2024-09-17 19:53:35,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016794451] [2024-09-17 19:53:35,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:53:35,857 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-09-17 19:53:35,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:53:35,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-09-17 19:53:35,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=4019, Unknown=0, NotChecked=0, Total=4290 [2024-09-17 19:53:35,858 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) [2024-09-17 19:53:37,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:53:37,864 INFO L93 Difference]: Finished difference Result 143 states and 142 transitions. [2024-09-17 19:53:37,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-17 19:53:37,864 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 [2024-09-17 19:53:37,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:53:37,865 INFO L225 Difference]: With dead ends: 143 [2024-09-17 19:53:37,865 INFO L226 Difference]: Without dead ends: 143 [2024-09-17 19:53:37,866 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=636, Invalid=8106, Unknown=0, NotChecked=0, Total=8742 [2024-09-17 19:53:37,867 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 403 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 5324 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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 [2024-09-17 19:53:37,867 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] [2024-09-17 19:53:37,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-09-17 19:53:37,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 131. [2024-09-17 19:53:37,869 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) [2024-09-17 19:53:37,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 142 transitions. [2024-09-17 19:53:37,870 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 142 transitions. Word has length 86 [2024-09-17 19:53:37,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:53:37,870 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 142 transitions. [2024-09-17 19:53:37,870 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) [2024-09-17 19:53:37,871 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 142 transitions. [2024-09-17 19:53:37,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-09-17 19:53:37,871 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:53:37,871 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 8, 8, 8, 1, 1, 1, 1] [2024-09-17 19:53:37,884 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-17 19:53:38,075 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 [2024-09-17 19:53:38,075 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:53:38,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:53:38,076 INFO L85 PathProgramCache]: Analyzing trace with hash 478197688, now seen corresponding path program 11 times [2024-09-17 19:53:38,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:53:38,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396674212] [2024-09-17 19:53:38,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:53:38,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:53:38,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:38,644 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 19:53:38,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:38,765 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:38,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:38,872 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:38,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:38,976 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:38,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:39,057 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:39,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:39,132 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:39,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:39,199 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:39,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:39,261 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:39,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:39,325 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 7 proven. 625 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-09-17 19:53:39,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:53:39,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396674212] [2024-09-17 19:53:39,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396674212] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:53:39,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521962243] [2024-09-17 19:53:39,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 19:53:39,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:53:39,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:53:39,330 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) [2024-09-17 19:53:39,331 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-17 19:53:39,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2024-09-17 19:53:39,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:53:39,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-09-17 19:53:39,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:53:39,553 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-09-17 19:53:39,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:53:39,896 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-09-17 19:53:39,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521962243] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:53:39,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:53:39,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 46 [2024-09-17 19:53:39,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880083663] [2024-09-17 19:53:39,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:53:39,897 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-17 19:53:39,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:53:39,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-17 19:53:39,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=2068, Unknown=0, NotChecked=0, Total=2162 [2024-09-17 19:53:39,898 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) [2024-09-17 19:53:41,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:53:41,775 INFO L93 Difference]: Finished difference Result 142 states and 141 transitions. [2024-09-17 19:53:41,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-09-17 19:53:41,776 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 [2024-09-17 19:53:41,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:53:41,777 INFO L225 Difference]: With dead ends: 142 [2024-09-17 19:53:41,777 INFO L226 Difference]: Without dead ends: 142 [2024-09-17 19:53:41,778 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=226, Invalid=5474, Unknown=0, NotChecked=0, Total=5700 [2024-09-17 19:53:41,778 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 166 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 4480 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.4s IncrementalHoareTripleChecker+Time [2024-09-17 19:53:41,779 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 471 Invalid, 4517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 4480 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-17 19:53:41,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-09-17 19:53:41,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 131. [2024-09-17 19:53:41,784 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) [2024-09-17 19:53:41,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 141 transitions. [2024-09-17 19:53:41,784 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 141 transitions. Word has length 89 [2024-09-17 19:53:41,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:53:41,785 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 141 transitions. [2024-09-17 19:53:41,785 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) [2024-09-17 19:53:41,785 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 141 transitions. [2024-09-17 19:53:41,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-09-17 19:53:41,785 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:53:41,785 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 9, 9, 9, 1, 1, 1, 1] [2024-09-17 19:53:41,798 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-17 19:53:41,985 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 [2024-09-17 19:53:41,986 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:53:41,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:53:41,987 INFO L85 PathProgramCache]: Analyzing trace with hash -419199801, now seen corresponding path program 12 times [2024-09-17 19:53:41,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:53:41,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230165243] [2024-09-17 19:53:41,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:53:41,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:53:42,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:42,649 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 19:53:42,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:42,811 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:42,957 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:42,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:43,104 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:43,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:43,214 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:43,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:43,320 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:43,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:43,402 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:43,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:43,479 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:43,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:43,546 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:53:43,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:53:43,612 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 8 proven. 627 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-09-17 19:53:43,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:53:43,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230165243] [2024-09-17 19:53:43,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230165243] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:53:43,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205936772] [2024-09-17 19:53:43,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 19:53:43,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:53:43,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:53:43,616 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) [2024-09-17 19:53:43,619 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-17 19:53:43,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2024-09-17 19:53:43,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:53:43,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-17 19:53:43,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:53:44,440 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 47 proven. 17 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2024-09-17 19:53:44,440 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:53:45,114 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 21