This is Ultimate 0.2.4-tmp.dk.referee-eval-f1d7dc9-m [2024-09-20 13:34:39,387 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 13:34:39,453 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 13:34:39,459 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 13:34:39,461 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 13:34:39,511 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 13:34:39,512 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 13:34:39,512 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 13:34:39,513 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 13:34:39,513 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 13:34:39,514 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 13:34:39,514 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 13:34:39,522 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 13:34:39,523 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 13:34:39,523 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 13:34:39,523 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 13:34:39,524 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 13:34:39,524 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 13:34:39,524 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 13:34:39,525 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 13:34:39,525 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 13:34:39,529 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 13:34:39,530 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 13:34:39,530 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 13:34:39,530 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 13:34:39,530 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 13:34:39,531 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 13:34:39,531 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 13:34:39,531 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 13:34:39,531 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 13:34:39,532 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 13:34:39,532 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 13:34:39,532 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 13:34:39,532 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 13:34:39,532 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 13:34:39,533 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 13:34:39,533 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 13:34:39,536 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 13:34:39,536 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 13:34:39,536 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 13:34:39,537 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 13:34:39,537 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 13:34:39,537 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> None [2024-09-20 13:34:39,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 13:34:39,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 13:34:39,769 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 13:34:39,770 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 13:34:39,771 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 13:34:39,772 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c [2024-09-20 13:34:41,175 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 13:34:41,369 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 13:34:41,369 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c [2024-09-20 13:34:41,377 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/31cf52ac0/54d5d180e6824b73b92fbcf34cc06a4d/FLAG7b620fa87 [2024-09-20 13:34:41,388 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/31cf52ac0/54d5d180e6824b73b92fbcf34cc06a4d [2024-09-20 13:34:41,390 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-09-20 13:34:41,391 INFO L274 PluginConnector]: Witness Parser initialized [2024-09-20 13:34:41,391 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../results/automizer-verification-files/SV-COMP24_unreach-call/egcd2-ll_valuebound2.yml/witness-2.1.yml [2024-09-20 13:34:41,444 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 13:34:41,445 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-09-20 13:34:41,448 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 13:34:41,448 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 13:34:41,453 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 13:34:41,453 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:34:41" (1/2) ... [2024-09-20 13:34:41,455 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f809474 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:34:41, skipping insertion in model container [2024-09-20 13:34:41,455 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:34:41" (1/2) ... [2024-09-20 13:34:41,456 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5d525255 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:34:41, skipping insertion in model container [2024-09-20 13:34:41,457 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.09 01:34:41" (2/2) ... [2024-09-20 13:34:41,457 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f809474 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:34:41, skipping insertion in model container [2024-09-20 13:34:41,458 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.09 01:34:41" (2/2) ... [2024-09-20 13:34:41,467 INFO L93 nessWitnessExtractor]: Found the following entries in the witness: [2024-09-20 13:34:41,467 INFO L1541 ArrayList]: Loop invariant at [L41-L68] (((((((((((((b == 1) && (s == 0)) && (p == 0)) && (y == xy)) && (r == 1)) && (a == y)) && (x == 1)) && (yy == ((long long) y * y))) && (a == 2)) && (q == 1)) || (((((((((1 <= x) && (y <= 2)) && (b == 0)) && (p == 0)) && (r == 1)) && (a == y)) && (1 <= y)) && ((((__int128) q * x) + ((__int128) y * s)) == 0)) && (x <= 2))) || ((((((((((((r == 0) && (y <= 2)) && (s == 1)) && (1 <= a)) && (b == y)) && (yy == ((long long) y * y))) && (q == 0)) && (1 <= y)) && (xy == ((long long) y * x))) && (a == x)) && (x <= 2)) && (p == 1))) || (((((((((((long long) x + 1) <= y) && (r == 0)) && (((__int128) ((long long) x * 2) + b) == y)) && (y <= 2)) && (s == 1)) && (((__int128) q + 2) == 0)) && (((__int128) b + 1) <= x)) && (a == x)) && (p == 1))) [2024-09-20 13:34:41,467 INFO L1541 ArrayList]: Loop invariant at [L47-L56] ((((((((((((((((((r == 0) && (s == 1)) && (a == ((__int128) c + b))) && (0 <= c)) && (b == y)) && (k == 1)) && (yy == ((long long) y * y))) && (q == 0)) && (1 <= y)) && (xy == ((long long) y * x))) && (a == x)) && (x <= 2)) && (p == 1)) || ((((((((((((((r == 0) && (a == (c + ((__int128) b * k)))) && (s == 1)) && (1 <= a)) && (0 <= c)) && (yy == ((long long) y * y))) && ((c + ((__int128) b * 2)) <= 2)) && (q == 0)) && (1 <= b)) && (xy == ((long long) y * x))) && (a == x)) && (x == (c + ((__int128) k * y)))) && (x <= 2)) && (p == 1))) || ((((((((((((((r == 0) && (y <= 2)) && (k == 0)) && (s == 1)) && (1 <= a)) && (b == y)) && (yy == ((long long) y * y))) && (q == 0)) && (1 <= y)) && (xy == ((long long) y * x))) && (a == x)) && (c == x)) && (x <= 2)) && (p == 1))) || ((((((((((((y == 2) && (b == 1)) && (s == 0)) && (p == 0)) && (k == 0)) && (2 == xy)) && (r == 1)) && (c == 2)) && (x == 1)) && (yy == 4)) && (a == 2)) && (q == 1))) || ((((((((((((y == 2) && (b == 1)) && (s == 0)) && (p == 0)) && (2 == xy)) && (r == 1)) && (x == 1)) && (yy == 4)) && (k == 1)) && (a == 2)) && (q == 1)) && (c == 1))) || ((((((((((((y == 2) && (b == 1)) && (s == 0)) && (p == 0)) && (2 == xy)) && (r == 1)) && (x == 1)) && (yy == 4)) && (k == 2)) && (a == 2)) && (c == 0)) && (q == 1))) [2024-09-20 13:34:41,467 INFO L1541 ArrayList]: Function contract at [L10]: requires (1 <= \old(cond)), ensures (1 <= \old(cond)) [2024-09-20 13:34:41,468 INFO L1541 ArrayList]: Function contract at [L7]: requires null, ensures (\old(cond) != 0) [2024-09-20 13:34:41,495 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 13:34:41,628 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/nla-digbench-scaling/egcd2-ll_valuebound2.c[490,503] [2024-09-20 13:34:41,647 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 13:34:41,654 INFO L200 MainTranslator]: Completed pre-run Start Parsing Global Start Parsing Global Start Parsing Global [2024-09-20 13:34:41,685 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/nla-digbench-scaling/egcd2-ll_valuebound2.c[490,503] Start Parsing Local Start Parsing Local [2024-09-20 13:34:41,717 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 13:34:41,736 INFO L204 MainTranslator]: Completed translation [2024-09-20 13:34:41,737 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:34:41 WrapperNode [2024-09-20 13:34:41,737 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 13:34:41,738 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 13:34:41,738 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 13:34:41,738 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 13:34:41,745 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:34:41" (1/1) ... [2024-09-20 13:34:41,757 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:34:41" (1/1) ... [2024-09-20 13:34:41,791 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 79 [2024-09-20 13:34:41,795 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 13:34:41,796 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 13:34:41,796 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 13:34:41,796 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 13:34:41,807 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:34:41" (1/1) ... [2024-09-20 13:34:41,807 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:34:41" (1/1) ... [2024-09-20 13:34:41,810 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:34:41" (1/1) ... [2024-09-20 13:34:41,819 WARN L109 MemorySlicer]: Omit memory slicing because it failed with the following exception: Unsupported: Procedure assume_abort_if_not is not part of the Ultimate memory model but has specification other that is not a ModifiesSpecification [2024-09-20 13:34:41,823 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:34:41" (1/1) ... [2024-09-20 13:34:41,823 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:34:41" (1/1) ... [2024-09-20 13:34:41,836 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:34:41" (1/1) ... [2024-09-20 13:34:41,839 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:34:41" (1/1) ... [2024-09-20 13:34:41,844 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:34:41" (1/1) ... [2024-09-20 13:34:41,845 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:34:41" (1/1) ... [2024-09-20 13:34:41,847 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 13:34:41,852 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 13:34:41,852 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 13:34:41,852 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 13:34:41,853 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:34:41" (1/1) ... [2024-09-20 13:34:41,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 13:34:41,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:34:41,887 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-20 13:34:41,891 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-20 13:34:41,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 13:34:41,936 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-20 13:34:41,937 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-20 13:34:41,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-09-20 13:34:41,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 13:34:41,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 13:34:41,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 13:34:41,938 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 13:34:42,003 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 13:34:42,006 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 13:34:42,372 WARN L783 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2024-09-20 13:34:42,418 INFO L? ?]: Removed 69 outVars from TransFormulas that were not future-live. [2024-09-20 13:34:42,419 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 13:34:42,447 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 13:34:42,447 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-20 13:34:42,447 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:34:42 BoogieIcfgContainer [2024-09-20 13:34:42,448 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 13:34:42,449 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 13:34:42,450 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 13:34:42,453 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 13:34:42,453 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:34:41" (1/4) ... [2024-09-20 13:34:42,455 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f5dd46c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:34:42, skipping insertion in model container [2024-09-20 13:34:42,455 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.09 01:34:41" (2/4) ... [2024-09-20 13:34:42,456 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f5dd46c and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.09 01:34:42, skipping insertion in model container [2024-09-20 13:34:42,456 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:34:41" (3/4) ... [2024-09-20 13:34:42,456 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f5dd46c and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.09 01:34:42, skipping insertion in model container [2024-09-20 13:34:42,456 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:34:42" (4/4) ... [2024-09-20 13:34:42,460 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound2.c [2024-09-20 13:34:42,476 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 13:34:42,477 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2024-09-20 13:34:42,531 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 13:34:42,538 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;@23dc6263, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 13:34:42,539 INFO L337 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2024-09-20 13:34:42,543 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 30 states have internal predecessors, (37), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-20 13:34:42,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-09-20 13:34:42,552 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:34:42,553 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-09-20 13:34:42,553 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting assume_abort_if_notErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (and 8 more)] === [2024-09-20 13:34:42,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:34:42,560 INFO L85 PathProgramCache]: Analyzing trace with hash 135674271, now seen corresponding path program 1 times [2024-09-20 13:34:42,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:34:42,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687434129] [2024-09-20 13:34:42,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:34:42,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:34:42,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:42,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:34:42,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:34:42,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687434129] [2024-09-20 13:34:42,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687434129] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:34:42,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:34:42,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 13:34:42,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707211502] [2024-09-20 13:34:42,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:34:42,712 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 13:34:42,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:34:42,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 13:34:42,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 13:34:42,740 INFO L87 Difference]: Start difference. First operand has 44 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 30 states have internal predecessors, (37), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 13:34:42,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:34:42,763 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2024-09-20 13:34:42,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 13:34:42,765 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-09-20 13:34:42,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:34:42,771 INFO L225 Difference]: With dead ends: 44 [2024-09-20 13:34:42,772 INFO L226 Difference]: Without dead ends: 42 [2024-09-20 13:34:42,774 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 13:34:42,777 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:34:42,778 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 13:34:42,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-20 13:34:42,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-09-20 13:34:42,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 29 states have internal predecessors, (30), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-20 13:34:42,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2024-09-20 13:34:42,808 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 5 [2024-09-20 13:34:42,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:34:42,808 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2024-09-20 13:34:42,808 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 13:34:42,808 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2024-09-20 13:34:42,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-09-20 13:34:42,809 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:34:42,809 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-09-20 13:34:42,809 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 13:34:42,810 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting assume_abort_if_notErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (and 8 more)] === [2024-09-20 13:34:42,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:34:42,810 INFO L85 PathProgramCache]: Analyzing trace with hash 135674333, now seen corresponding path program 1 times [2024-09-20 13:34:42,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:34:42,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454613348] [2024-09-20 13:34:42,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:34:42,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:34:42,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:42,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:34:42,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:34:42,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454613348] [2024-09-20 13:34:42,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454613348] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:34:42,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:34:42,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-20 13:34:42,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592388846] [2024-09-20 13:34:42,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:34:42,898 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-20 13:34:42,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:34:42,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-20 13:34:42,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-20 13:34:42,899 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 13:34:42,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:34:42,967 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2024-09-20 13:34:42,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-20 13:34:42,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-09-20 13:34:42,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:34:42,969 INFO L225 Difference]: With dead ends: 41 [2024-09-20 13:34:42,969 INFO L226 Difference]: Without dead ends: 41 [2024-09-20 13:34:42,969 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-20 13:34:42,970 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 1 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:34:42,971 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 112 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:34:42,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-20 13:34:42,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-09-20 13:34:42,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 28 states have internal predecessors, (29), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-20 13:34:42,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2024-09-20 13:34:42,979 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 5 [2024-09-20 13:34:42,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:34:42,979 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2024-09-20 13:34:42,979 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 13:34:42,979 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2024-09-20 13:34:42,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-20 13:34:42,980 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:34:42,980 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:34:42,980 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 13:34:42,981 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (and 8 more)] === [2024-09-20 13:34:42,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:34:42,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1738672974, now seen corresponding path program 1 times [2024-09-20 13:34:42,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:34:42,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572879504] [2024-09-20 13:34:42,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:34:42,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:34:43,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:43,689 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-20 13:34:43,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:43,730 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 13:34:43,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:43,750 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 13:34:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:43,764 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 13:34:43,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:43,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 13:34:43,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:43,806 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 13:34:43,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:43,840 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 13:34:43,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:34:43,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572879504] [2024-09-20 13:34:43,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572879504] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:34:43,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479487178] [2024-09-20 13:34:43,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:34:43,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:34:43,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:34:43,848 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:34:43,852 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 13:34:43,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:43,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-20 13:34:43,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:34:44,297 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 13:34:44,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:34:44,743 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 13:34:44,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479487178] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:34:44,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:34:44,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-09-20 13:34:44,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738263056] [2024-09-20 13:34:44,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:34:44,744 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-20 13:34:44,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:34:44,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-20 13:34:44,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-09-20 13:34:44,749 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 15 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 10 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2024-09-20 13:34:45,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:34:45,001 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2024-09-20 13:34:45,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-20 13:34:45,002 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 10 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) Word has length 34 [2024-09-20 13:34:45,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:34:45,003 INFO L225 Difference]: With dead ends: 54 [2024-09-20 13:34:45,003 INFO L226 Difference]: Without dead ends: 54 [2024-09-20 13:34:45,004 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2024-09-20 13:34:45,005 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 13:34:45,005 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 143 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 13:34:45,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-20 13:34:45,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2024-09-20 13:34:45,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 33 states have internal predecessors, (38), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-20 13:34:45,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2024-09-20 13:34:45,013 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 34 [2024-09-20 13:34:45,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:34:45,014 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2024-09-20 13:34:45,014 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 10 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2024-09-20 13:34:45,014 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2024-09-20 13:34:45,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-20 13:34:45,015 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:34:45,018 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:34:45,035 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-20 13:34:45,222 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:34:45,223 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (and 8 more)] === [2024-09-20 13:34:45,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:34:45,224 INFO L85 PathProgramCache]: Analyzing trace with hash -498970520, now seen corresponding path program 1 times [2024-09-20 13:34:45,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:34:45,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395166039] [2024-09-20 13:34:45,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:34:45,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:34:45,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:45,638 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-20 13:34:45,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:45,642 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 13:34:45,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:45,644 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 13:34:45,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:45,646 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 13:34:45,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:45,648 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 13:34:45,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:45,659 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 13:34:45,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:45,668 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-20 13:34:45,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:34:45,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395166039] [2024-09-20 13:34:45,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395166039] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:34:45,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:34:45,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-20 13:34:45,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52584778] [2024-09-20 13:34:45,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:34:45,669 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 13:34:45,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:34:45,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 13:34:45,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-20 13:34:45,670 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-20 13:34:45,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:34:45,812 INFO L93 Difference]: Finished difference Result 60 states and 83 transitions. [2024-09-20 13:34:45,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 13:34:45,812 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2024-09-20 13:34:45,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:34:45,813 INFO L225 Difference]: With dead ends: 60 [2024-09-20 13:34:45,813 INFO L226 Difference]: Without dead ends: 60 [2024-09-20 13:34:45,814 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-09-20 13:34:45,815 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 21 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:34:45,815 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 106 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:34:45,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-20 13:34:45,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2024-09-20 13:34:45,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.25) internal successors, (40), 36 states have internal predecessors, (40), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-20 13:34:45,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 73 transitions. [2024-09-20 13:34:45,822 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 73 transitions. Word has length 37 [2024-09-20 13:34:45,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:34:45,822 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 73 transitions. [2024-09-20 13:34:45,823 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-20 13:34:45,823 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 73 transitions. [2024-09-20 13:34:45,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-20 13:34:45,824 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:34:45,824 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:34:45,824 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-20 13:34:45,824 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr1ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (and 8 more)] === [2024-09-20 13:34:45,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:34:45,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1880432174, now seen corresponding path program 1 times [2024-09-20 13:34:45,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:34:45,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174449135] [2024-09-20 13:34:45,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:34:45,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:34:45,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:45,853 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-20 13:34:45,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:45,856 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 13:34:45,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:45,858 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 13:34:45,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:45,860 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 13:34:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:45,861 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 13:34:45,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:45,863 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 13:34:45,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:45,865 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-20 13:34:45,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:34:45,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174449135] [2024-09-20 13:34:45,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174449135] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:34:45,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:34:45,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 13:34:45,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162170004] [2024-09-20 13:34:45,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:34:45,867 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-20 13:34:45,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:34:45,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-20 13:34:45,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 13:34:45,868 INFO L87 Difference]: Start difference. First operand 54 states and 73 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-09-20 13:34:45,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:34:45,894 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2024-09-20 13:34:45,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-20 13:34:45,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 42 [2024-09-20 13:34:45,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:34:45,897 INFO L225 Difference]: With dead ends: 53 [2024-09-20 13:34:45,897 INFO L226 Difference]: Without dead ends: 53 [2024-09-20 13:34:45,897 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 13:34:45,898 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 3 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:34:45,898 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 77 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 13:34:45,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-20 13:34:45,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-09-20 13:34:45,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 32 states have (on average 1.21875) internal successors, (39), 35 states have internal predecessors, (39), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-20 13:34:45,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2024-09-20 13:34:45,907 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 72 transitions. Word has length 42 [2024-09-20 13:34:45,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:34:45,907 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 72 transitions. [2024-09-20 13:34:45,907 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-09-20 13:34:45,907 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 72 transitions. [2024-09-20 13:34:45,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-20 13:34:45,909 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:34:45,909 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:34:45,909 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-20 13:34:45,909 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (and 8 more)] === [2024-09-20 13:34:45,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:34:45,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1880432013, now seen corresponding path program 1 times [2024-09-20 13:34:45,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:34:45,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630822348] [2024-09-20 13:34:45,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:34:45,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:34:45,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:45,976 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-20 13:34:45,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:45,978 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 13:34:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:45,980 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 13:34:45,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:45,982 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 13:34:45,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:45,983 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 13:34:45,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:45,985 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 13:34:45,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:45,987 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-20 13:34:45,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:34:45,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630822348] [2024-09-20 13:34:45,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630822348] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:34:45,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:34:45,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-20 13:34:45,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326888774] [2024-09-20 13:34:45,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:34:45,988 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-20 13:34:45,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:34:45,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-20 13:34:45,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 13:34:45,989 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-09-20 13:34:46,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:34:46,003 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2024-09-20 13:34:46,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-20 13:34:46,005 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 42 [2024-09-20 13:34:46,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:34:46,005 INFO L225 Difference]: With dead ends: 51 [2024-09-20 13:34:46,005 INFO L226 Difference]: Without dead ends: 51 [2024-09-20 13:34:46,006 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 13:34:46,008 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:34:46,009 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 92 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 13:34:46,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-20 13:34:46,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-09-20 13:34:46,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 33 states have internal predecessors, (37), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-20 13:34:46,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2024-09-20 13:34:46,017 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 42 [2024-09-20 13:34:46,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:34:46,018 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2024-09-20 13:34:46,018 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-09-20 13:34:46,018 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2024-09-20 13:34:46,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-20 13:34:46,019 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:34:46,019 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:34:46,019 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-20 13:34:46,021 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (and 8 more)] === [2024-09-20 13:34:46,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:34:46,021 INFO L85 PathProgramCache]: Analyzing trace with hash 837542670, now seen corresponding path program 1 times [2024-09-20 13:34:46,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:34:46,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969432339] [2024-09-20 13:34:46,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:34:46,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:34:46,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:46,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-20 13:34:46,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:46,580 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 13:34:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:46,582 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 13:34:46,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:46,584 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 13:34:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:46,586 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 13:34:46,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:46,594 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 13:34:46,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:46,602 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-20 13:34:46,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:46,615 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-20 13:34:46,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:46,628 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-20 13:34:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:46,641 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-20 13:34:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:46,655 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-20 13:34:46,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:34:46,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969432339] [2024-09-20 13:34:46,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969432339] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:34:46,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142711781] [2024-09-20 13:34:46,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:34:46,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:34:46,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:34:46,658 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:34:46,664 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 13:34:46,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:46,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-20 13:34:46,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:34:47,361 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-20 13:34:47,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:34:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-20 13:34:48,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142711781] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:34:48,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:34:48,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-09-20 13:34:48,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045631118] [2024-09-20 13:34:48,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:34:48,173 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 13:34:48,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:34:48,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 13:34:48,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2024-09-20 13:34:48,174 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-20 13:34:48,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:34:48,585 INFO L93 Difference]: Finished difference Result 84 states and 125 transitions. [2024-09-20 13:34:48,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-20 13:34:48,586 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 60 [2024-09-20 13:34:48,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:34:48,587 INFO L225 Difference]: With dead ends: 84 [2024-09-20 13:34:48,588 INFO L226 Difference]: Without dead ends: 84 [2024-09-20 13:34:48,588 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2024-09-20 13:34:48,588 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 20 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 13:34:48,589 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 171 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 13:34:48,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-09-20 13:34:48,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 62. [2024-09-20 13:34:48,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.236842105263158) internal successors, (47), 40 states have internal predecessors, (47), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-20 13:34:48,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 87 transitions. [2024-09-20 13:34:48,603 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 87 transitions. Word has length 60 [2024-09-20 13:34:48,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:34:48,603 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 87 transitions. [2024-09-20 13:34:48,603 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-20 13:34:48,603 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 87 transitions. [2024-09-20 13:34:48,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-20 13:34:48,608 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:34:48,608 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:34:48,626 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-20 13:34:48,809 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-20 13:34:48,809 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (and 8 more)] === [2024-09-20 13:34:48,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:34:48,810 INFO L85 PathProgramCache]: Analyzing trace with hash 194017890, now seen corresponding path program 1 times [2024-09-20 13:34:48,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:34:48,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851852736] [2024-09-20 13:34:48,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:34:48,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:34:48,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:34:48,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [970370858] [2024-09-20 13:34:48,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:34:48,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:34:48,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:34:48,842 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:34:48,843 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 13:34:48,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:48,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-20 13:34:48,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:34:49,514 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-20 13:34:49,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:34:50,127 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-20 13:34:50,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:34:50,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851852736] [2024-09-20 13:34:50,128 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:34:50,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970370858] [2024-09-20 13:34:50,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970370858] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 13:34:50,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:34:50,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-09-20 13:34:50,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145978045] [2024-09-20 13:34:50,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:34:50,129 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 13:34:50,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:34:50,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 13:34:50,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-09-20 13:34:50,130 INFO L87 Difference]: Start difference. First operand 62 states and 87 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-20 13:34:50,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:34:50,427 INFO L93 Difference]: Finished difference Result 95 states and 150 transitions. [2024-09-20 13:34:50,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 13:34:50,427 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 61 [2024-09-20 13:34:50,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:34:50,428 INFO L225 Difference]: With dead ends: 95 [2024-09-20 13:34:50,428 INFO L226 Difference]: Without dead ends: 95 [2024-09-20 13:34:50,429 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-09-20 13:34:50,429 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 19 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 13:34:50,429 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 136 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 13:34:50,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-09-20 13:34:50,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2024-09-20 13:34:50,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 61 states have (on average 1.2622950819672132) internal successors, (77), 56 states have internal predecessors, (77), 36 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2024-09-20 13:34:50,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 149 transitions. [2024-09-20 13:34:50,439 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 149 transitions. Word has length 61 [2024-09-20 13:34:50,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:34:50,440 INFO L474 AbstractCegarLoop]: Abstraction has 94 states and 149 transitions. [2024-09-20 13:34:50,440 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-20 13:34:50,440 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 149 transitions. [2024-09-20 13:34:50,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-20 13:34:50,442 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:34:50,442 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:34:50,454 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-20 13:34:50,643 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-20 13:34:50,644 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (and 8 more)] === [2024-09-20 13:34:50,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:34:50,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1038968620, now seen corresponding path program 1 times [2024-09-20 13:34:50,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:34:50,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902060210] [2024-09-20 13:34:50,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:34:50,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:34:50,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:34:50,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [174946284] [2024-09-20 13:34:50,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:34:50,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:34:50,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:34:50,674 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:34:50,676 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 13:34:50,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:50,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-20 13:34:50,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:34:51,341 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-20 13:34:51,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:34:52,005 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-20 13:34:52,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:34:52,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902060210] [2024-09-20 13:34:52,005 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:34:52,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174946284] [2024-09-20 13:34:52,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174946284] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 13:34:52,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:34:52,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2024-09-20 13:34:52,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386447761] [2024-09-20 13:34:52,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:34:52,007 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 13:34:52,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:34:52,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 13:34:52,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-09-20 13:34:52,008 INFO L87 Difference]: Start difference. First operand 94 states and 149 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-20 13:34:52,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:34:52,524 INFO L93 Difference]: Finished difference Result 128 states and 213 transitions. [2024-09-20 13:34:52,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-20 13:34:52,524 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 64 [2024-09-20 13:34:52,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:34:52,525 INFO L225 Difference]: With dead ends: 128 [2024-09-20 13:34:52,525 INFO L226 Difference]: Without dead ends: 128 [2024-09-20 13:34:52,526 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2024-09-20 13:34:52,526 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 23 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 13:34:52,527 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 183 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 13:34:52,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-09-20 13:34:52,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 119. [2024-09-20 13:34:52,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 78 states have (on average 1.2692307692307692) internal successors, (99), 69 states have internal predecessors, (99), 48 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2024-09-20 13:34:52,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 195 transitions. [2024-09-20 13:34:52,542 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 195 transitions. Word has length 64 [2024-09-20 13:34:52,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:34:52,542 INFO L474 AbstractCegarLoop]: Abstraction has 119 states and 195 transitions. [2024-09-20 13:34:52,543 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-20 13:34:52,543 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 195 transitions. [2024-09-20 13:34:52,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-09-20 13:34:52,544 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:34:52,544 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:34:52,561 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 13:34:52,745 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:34:52,745 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (and 8 more)] === [2024-09-20 13:34:52,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:34:52,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1600080472, now seen corresponding path program 2 times [2024-09-20 13:34:52,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:34:52,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814318991] [2024-09-20 13:34:52,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:34:52,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:34:52,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:34:52,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2093810358] [2024-09-20 13:34:52,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:34:52,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:34:52,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:34:52,776 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:34:52,778 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 13:34:52,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 13:34:52,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:34:52,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-20 13:34:52,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:34:53,612 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-20 13:34:53,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:34:54,803 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-20 13:34:54,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:34:54,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814318991] [2024-09-20 13:34:54,803 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:34:54,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093810358] [2024-09-20 13:34:54,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093810358] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:34:54,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 13:34:54,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2024-09-20 13:34:54,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915610939] [2024-09-20 13:34:54,804 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 13:34:54,805 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-20 13:34:54,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:34:54,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-20 13:34:54,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2024-09-20 13:34:54,806 INFO L87 Difference]: Start difference. First operand 119 states and 195 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2024-09-20 13:34:55,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:34:55,233 INFO L93 Difference]: Finished difference Result 193 states and 319 transitions. [2024-09-20 13:34:55,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-20 13:34:55,234 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) Word has length 83 [2024-09-20 13:34:55,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:34:55,235 INFO L225 Difference]: With dead ends: 193 [2024-09-20 13:34:55,235 INFO L226 Difference]: Without dead ends: 193 [2024-09-20 13:34:55,236 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2024-09-20 13:34:55,236 INFO L434 NwaCegarLoop]: 56 mSDtfsCounter, 21 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 13:34:55,237 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 201 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 13:34:55,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-09-20 13:34:55,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 173. [2024-09-20 13:34:55,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 108 states have (on average 1.3148148148148149) internal successors, (142), 95 states have internal predecessors, (142), 75 states have call successors, (75), 2 states have call predecessors, (75), 2 states have return successors, (75), 75 states have call predecessors, (75), 75 states have call successors, (75) [2024-09-20 13:34:55,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 292 transitions. [2024-09-20 13:34:55,249 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 292 transitions. Word has length 83 [2024-09-20 13:34:55,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:34:55,250 INFO L474 AbstractCegarLoop]: Abstraction has 173 states and 292 transitions. [2024-09-20 13:34:55,250 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2024-09-20 13:34:55,250 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 292 transitions. [2024-09-20 13:34:55,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-09-20 13:34:55,251 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:34:55,251 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:34:55,267 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 13:34:55,455 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-20 13:34:55,456 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (and 8 more)] === [2024-09-20 13:34:55,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:34:55,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1937111816, now seen corresponding path program 1 times [2024-09-20 13:34:55,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:34:55,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913975340] [2024-09-20 13:34:55,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:34:55,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:34:55,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:34:55,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822528923] [2024-09-20 13:34:55,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:34:55,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:34:55,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:34:55,488 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:34:55,492 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 13:34:55,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:55,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-20 13:34:55,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:34:56,079 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-20 13:34:56,079 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:34:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-20 13:34:57,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:34:57,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913975340] [2024-09-20 13:34:57,022 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:34:57,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822528923] [2024-09-20 13:34:57,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822528923] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:34:57,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 13:34:57,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2024-09-20 13:34:57,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245300974] [2024-09-20 13:34:57,023 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 13:34:57,023 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-20 13:34:57,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:34:57,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-20 13:34:57,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-09-20 13:34:57,024 INFO L87 Difference]: Start difference. First operand 173 states and 292 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 6 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2024-09-20 13:34:57,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:34:57,939 INFO L93 Difference]: Finished difference Result 118 states and 180 transitions. [2024-09-20 13:34:57,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-20 13:34:57,939 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 6 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 84 [2024-09-20 13:34:57,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:34:57,940 INFO L225 Difference]: With dead ends: 118 [2024-09-20 13:34:57,940 INFO L226 Difference]: Without dead ends: 118 [2024-09-20 13:34:57,940 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-09-20 13:34:57,941 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 34 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-20 13:34:57,941 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 282 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-20 13:34:57,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-09-20 13:34:57,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 105. [2024-09-20 13:34:57,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 67 states have (on average 1.208955223880597) internal successors, (81), 59 states have internal predecessors, (81), 43 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-09-20 13:34:57,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 167 transitions. [2024-09-20 13:34:57,948 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 167 transitions. Word has length 84 [2024-09-20 13:34:57,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:34:57,948 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 167 transitions. [2024-09-20 13:34:57,951 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 6 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2024-09-20 13:34:57,951 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 167 transitions. [2024-09-20 13:34:57,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-20 13:34:57,952 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:34:57,953 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:34:57,971 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-20 13:34:58,153 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-20 13:34:58,153 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (and 8 more)] === [2024-09-20 13:34:58,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:34:58,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1223876898, now seen corresponding path program 1 times [2024-09-20 13:34:58,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:34:58,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208457553] [2024-09-20 13:34:58,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:34:58,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:34:58,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:58,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-20 13:34:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:58,989 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 13:34:58,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:58,990 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 13:34:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:58,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 13:34:58,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:58,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 13:34:58,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:58,997 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 13:34:58,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:59,000 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-20 13:34:59,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:59,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-20 13:34:59,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:59,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-20 13:34:59,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:59,019 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-20 13:34:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:59,025 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-20 13:34:59,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:59,035 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-20 13:34:59,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:59,045 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-20 13:34:59,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:59,054 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-20 13:34:59,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:59,065 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-20 13:34:59,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:34:59,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208457553] [2024-09-20 13:34:59,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208457553] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:34:59,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838305166] [2024-09-20 13:34:59,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:34:59,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:34:59,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:34:59,068 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:34:59,072 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 13:34:59,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:34:59,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-20 13:34:59,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:34:59,829 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-20 13:34:59,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:35:00,866 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-20 13:35:00,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838305166] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:35:00,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:35:00,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2024-09-20 13:35:00,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201479685] [2024-09-20 13:35:00,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:35:00,867 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 13:35:00,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:35:00,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 13:35:00,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2024-09-20 13:35:00,868 INFO L87 Difference]: Start difference. First operand 105 states and 167 transitions. Second operand has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 23 states have internal predecessors, (47), 7 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2024-09-20 13:35:01,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:35:01,540 INFO L93 Difference]: Finished difference Result 116 states and 178 transitions. [2024-09-20 13:35:01,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-20 13:35:01,541 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 23 states have internal predecessors, (47), 7 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) Word has length 87 [2024-09-20 13:35:01,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:35:01,541 INFO L225 Difference]: With dead ends: 116 [2024-09-20 13:35:01,541 INFO L226 Difference]: Without dead ends: 116 [2024-09-20 13:35:01,542 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2024-09-20 13:35:01,542 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 43 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 13:35:01,543 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 326 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 13:35:01,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-09-20 13:35:01,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 82. [2024-09-20 13:35:01,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 48 states have internal predecessors, (53), 31 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2024-09-20 13:35:01,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 115 transitions. [2024-09-20 13:35:01,548 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 115 transitions. Word has length 87 [2024-09-20 13:35:01,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:35:01,549 INFO L474 AbstractCegarLoop]: Abstraction has 82 states and 115 transitions. [2024-09-20 13:35:01,549 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 23 states have internal predecessors, (47), 7 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2024-09-20 13:35:01,549 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 115 transitions. [2024-09-20 13:35:01,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-20 13:35:01,550 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:35:01,551 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:35:01,567 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-20 13:35:01,754 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:35:01,755 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONPRE_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (and 8 more)] === [2024-09-20 13:35:01,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:35:01,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1317572175, now seen corresponding path program 1 times [2024-09-20 13:35:01,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:35:01,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740261125] [2024-09-20 13:35:01,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:35:01,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:35:01,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:35:02,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-20 13:35:02,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:35:02,011 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 13:35:02,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:35:02,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 13:35:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:35:02,014 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 13:35:02,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:35:02,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 13:35:02,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:35:02,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 13:35:02,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:35:02,020 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-20 13:35:02,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:35:02,023 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-20 13:35:02,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:35:02,027 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-20 13:35:02,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:35:02,030 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-20 13:35:02,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:35:02,034 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-20 13:35:02,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:35:02,039 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-20 13:35:02,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:35:02,043 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-20 13:35:02,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:35:02,047 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-20 13:35:02,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:35:02,055 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2024-09-20 13:35:02,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:35:02,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740261125] [2024-09-20 13:35:02,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740261125] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:35:02,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715181462] [2024-09-20 13:35:02,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:35:02,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:35:02,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:35:02,058 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:35:02,059 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 13:35:02,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:35:02,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-20 13:35:02,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:35:02,458 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-20 13:35:02,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:35:02,547 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-20 13:35:02,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715181462] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 13:35:02,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-20 13:35:02,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 6] total 13 [2024-09-20 13:35:02,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493762849] [2024-09-20 13:35:02,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:35:02,549 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-20 13:35:02,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:35:02,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-20 13:35:02,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-09-20 13:35:02,549 INFO L87 Difference]: Start difference. First operand 82 states and 115 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-09-20 13:35:02,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:35:02,624 INFO L93 Difference]: Finished difference Result 81 states and 114 transitions. [2024-09-20 13:35:02,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-20 13:35:02,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 87 [2024-09-20 13:35:02,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:35:02,625 INFO L225 Difference]: With dead ends: 81 [2024-09-20 13:35:02,625 INFO L226 Difference]: Without dead ends: 81 [2024-09-20 13:35:02,626 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-09-20 13:35:02,626 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 5 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:35:02,626 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 54 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:35:02,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-20 13:35:02,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-09-20 13:35:02,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 47 states have internal predecessors, (52), 31 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2024-09-20 13:35:02,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 114 transitions. [2024-09-20 13:35:02,630 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 114 transitions. Word has length 87 [2024-09-20 13:35:02,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:35:02,631 INFO L474 AbstractCegarLoop]: Abstraction has 81 states and 114 transitions. [2024-09-20 13:35:02,631 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-09-20 13:35:02,631 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 114 transitions. [2024-09-20 13:35:02,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-09-20 13:35:02,632 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:35:02,632 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:35:02,649 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-20 13:35:02,836 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:35:02,837 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONPRE_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (and 8 more)] === [2024-09-20 13:35:02,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:35:02,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1215787035, now seen corresponding path program 1 times [2024-09-20 13:35:02,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:35:02,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151158403] [2024-09-20 13:35:02,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:35:02,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:35:02,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:35:02,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [430119154] [2024-09-20 13:35:02,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:35:02,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:35:02,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:35:02,858 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:35:02,860 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 13:35:02,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:35:02,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-20 13:35:02,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:35:03,028 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2024-09-20 13:35:03,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:35:03,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:35:03,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151158403] [2024-09-20 13:35:03,050 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:35:03,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430119154] [2024-09-20 13:35:03,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430119154] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:35:03,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:35:03,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2024-09-20 13:35:03,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937292102] [2024-09-20 13:35:03,050 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:35:03,051 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-20 13:35:03,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:35:03,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-20 13:35:03,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-20 13:35:03,051 INFO L87 Difference]: Start difference. First operand 81 states and 114 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-20 13:35:03,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:35:03,127 INFO L93 Difference]: Finished difference Result 104 states and 152 transitions. [2024-09-20 13:35:03,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-20 13:35:03,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 92 [2024-09-20 13:35:03,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:35:03,128 INFO L225 Difference]: With dead ends: 104 [2024-09-20 13:35:03,128 INFO L226 Difference]: Without dead ends: 84 [2024-09-20 13:35:03,129 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-20 13:35:03,129 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 5 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:35:03,129 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 100 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:35:03,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-09-20 13:35:03,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 63. [2024-09-20 13:35:03,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 37 states have internal predecessors, (40), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-20 13:35:03,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 86 transitions. [2024-09-20 13:35:03,133 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 86 transitions. Word has length 92 [2024-09-20 13:35:03,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:35:03,134 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 86 transitions. [2024-09-20 13:35:03,134 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-20 13:35:03,134 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 86 transitions. [2024-09-20 13:35:03,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-09-20 13:35:03,135 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:35:03,135 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:35:03,152 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-20 13:35:03,336 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-20 13:35:03,336 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (and 8 more)] === [2024-09-20 13:35:03,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:35:03,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1052451092, now seen corresponding path program 2 times [2024-09-20 13:35:03,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:35:03,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008435050] [2024-09-20 13:35:03,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:35:03,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:35:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:35:04,147 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-20 13:35:04,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:35:04,149 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 13:35:04,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:35:04,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 13:35:04,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:35:04,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 13:35:04,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:35:04,157 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 13:35:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:35:04,162 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 13:35:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:35:04,166 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-20 13:35:04,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:35:04,171 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-20 13:35:04,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:35:04,179 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-20 13:35:04,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:35:04,183 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-20 13:35:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:35:04,188 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-20 13:35:04,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:35:04,200 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-20 13:35:04,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:35:04,210 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-20 13:35:04,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:35:04,223 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-20 13:35:04,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:35:04,236 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-20 13:35:04,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:35:04,244 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-20 13:35:04,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:35:04,256 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-09-20 13:35:04,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:35:04,266 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-20 13:35:04,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:35:04,276 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2024-09-20 13:35:04,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:35:04,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008435050] [2024-09-20 13:35:04,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008435050] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:35:04,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113187686] [2024-09-20 13:35:04,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:35:04,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:35:04,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:35:04,281 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:35:04,283 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 13:35:04,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 13:35:04,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:35:04,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-20 13:35:04,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:35:05,384 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2024-09-20 13:35:05,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:35:08,512 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2024-09-20 13:35:08,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113187686] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:35:08,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:35:08,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2024-09-20 13:35:08,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238338399] [2024-09-20 13:35:08,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:35:08,513 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 13:35:08,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:35:08,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 13:35:08,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2024-09-20 13:35:08,515 INFO L87 Difference]: Start difference. First operand 63 states and 86 transitions. Second operand has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 23 states have internal predecessors, (53), 9 states have call successors, (34), 1 states have call predecessors, (34), 1 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2024-09-20 13:35:09,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:35:09,414 INFO L93 Difference]: Finished difference Result 68 states and 92 transitions. [2024-09-20 13:35:09,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-20 13:35:09,415 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 23 states have internal predecessors, (53), 9 states have call successors, (34), 1 states have call predecessors, (34), 1 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) Word has length 110 [2024-09-20 13:35:09,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:35:09,416 INFO L225 Difference]: With dead ends: 68 [2024-09-20 13:35:09,416 INFO L226 Difference]: Without dead ends: 62 [2024-09-20 13:35:09,416 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2024-09-20 13:35:09,417 INFO L434 NwaCegarLoop]: 69 mSDtfsCounter, 37 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 13:35:09,417 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 494 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 13:35:09,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-09-20 13:35:09,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-09-20 13:35:09,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 36 states have internal predecessors, (36), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-20 13:35:09,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 82 transitions. [2024-09-20 13:35:09,421 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 82 transitions. Word has length 110 [2024-09-20 13:35:09,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:35:09,422 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 82 transitions. [2024-09-20 13:35:09,422 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 23 states have internal predecessors, (53), 9 states have call successors, (34), 1 states have call predecessors, (34), 1 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2024-09-20 13:35:09,422 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 82 transitions. [2024-09-20 13:35:09,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-09-20 13:35:09,423 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:35:09,423 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:35:09,441 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-20 13:35:09,627 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-20 13:35:09,628 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (and 8 more)] === [2024-09-20 13:35:09,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:35:09,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1894971634, now seen corresponding path program 2 times [2024-09-20 13:35:09,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:35:09,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665248391] [2024-09-20 13:35:09,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:35:09,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:35:09,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:35:09,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558161602] [2024-09-20 13:35:09,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:35:09,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:35:09,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:35:09,675 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:35:09,677 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 13:35:09,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 13:35:09,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:35:09,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-20 13:35:09,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:35:10,644 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2024-09-20 13:35:10,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:35:11,667 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2024-09-20 13:35:11,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:35:11,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665248391] [2024-09-20 13:35:11,667 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:35:11,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558161602] [2024-09-20 13:35:11,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558161602] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:35:11,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 13:35:11,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2024-09-20 13:35:11,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242055514] [2024-09-20 13:35:11,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 13:35:11,668 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-20 13:35:11,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:35:11,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-20 13:35:11,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2024-09-20 13:35:11,670 INFO L87 Difference]: Start difference. First operand 62 states and 82 transitions. Second operand has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 19 states have internal predecessors, (51), 10 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2024-09-20 13:35:12,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:35:12,053 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2024-09-20 13:35:12,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-20 13:35:12,053 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 19 states have internal predecessors, (51), 10 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) Word has length 134 [2024-09-20 13:35:12,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:35:12,054 INFO L225 Difference]: With dead ends: 59 [2024-09-20 13:35:12,054 INFO L226 Difference]: Without dead ends: 59 [2024-09-20 13:35:12,055 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 247 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2024-09-20 13:35:12,055 INFO L434 NwaCegarLoop]: 61 mSDtfsCounter, 33 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 13:35:12,056 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 350 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 13:35:12,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-20 13:35:12,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-09-20 13:35:12,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.0) internal successors, (33), 33 states have internal predecessors, (33), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-20 13:35:12,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 79 transitions. [2024-09-20 13:35:12,060 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 79 transitions. Word has length 134 [2024-09-20 13:35:12,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:35:12,061 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 79 transitions. [2024-09-20 13:35:12,061 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 19 states have internal predecessors, (51), 10 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2024-09-20 13:35:12,061 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 79 transitions. [2024-09-20 13:35:12,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-09-20 13:35:12,063 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:35:12,063 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 17, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:35:12,081 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-20 13:35:12,263 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-20 13:35:12,264 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONPRE_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (and 8 more)] === [2024-09-20 13:35:12,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:35:12,264 INFO L85 PathProgramCache]: Analyzing trace with hash -85051925, now seen corresponding path program 2 times [2024-09-20 13:35:12,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:35:12,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214987723] [2024-09-20 13:35:12,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:35:12,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:35:12,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:35:12,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1202432293] [2024-09-20 13:35:12,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:35:12,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:35:12,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:35:12,305 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:35:12,306 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-20 13:35:12,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-09-20 13:35:12,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:35:12,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-09-20 13:35:12,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:35:12,697 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2024-09-20 13:35:12,698 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 13:35:12,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:35:12,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214987723] [2024-09-20 13:35:12,698 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:35:12,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202432293] [2024-09-20 13:35:12,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202432293] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:35:12,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:35:12,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-20 13:35:12,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499464966] [2024-09-20 13:35:12,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:35:12,699 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-20 13:35:12,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:35:12,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-20 13:35:12,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-20 13:35:12,699 INFO L87 Difference]: Start difference. First operand 59 states and 79 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-09-20 13:35:12,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:35:12,755 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2024-09-20 13:35:12,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-20 13:35:12,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 142 [2024-09-20 13:35:12,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:35:12,756 INFO L225 Difference]: With dead ends: 58 [2024-09-20 13:35:12,756 INFO L226 Difference]: Without dead ends: 0 [2024-09-20 13:35:12,756 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-20 13:35:12,756 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 5 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:35:12,756 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 78 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:35:12,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-20 13:35:12,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-20 13:35:12,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 13:35:12,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-20 13:35:12,757 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 142 [2024-09-20 13:35:12,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:35:12,757 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-20 13:35:12,757 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-09-20 13:35:12,757 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-20 13:35:12,757 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-20 13:35:12,759 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 11 remaining) [2024-09-20 13:35:12,760 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 11 remaining) [2024-09-20 13:35:12,760 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (8 of 11 remaining) [2024-09-20 13:35:12,760 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONPRE_CONDITION (7 of 11 remaining) [2024-09-20 13:35:12,760 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONPRE_CONDITION (6 of 11 remaining) [2024-09-20 13:35:12,760 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONPRE_CONDITION (5 of 11 remaining) [2024-09-20 13:35:12,760 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONPRE_CONDITION (4 of 11 remaining) [2024-09-20 13:35:12,760 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONPRE_CONDITION (3 of 11 remaining) [2024-09-20 13:35:12,760 INFO L785 garLoopResultBuilder]: Registering result SAFE for location assume_abort_if_notErr0ENSURES_VIOLATIONPOST_CONDITION (2 of 11 remaining) [2024-09-20 13:35:12,760 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 11 remaining) [2024-09-20 13:35:12,760 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr1ENSURES_VIOLATIONPOST_CONDITION (0 of 11 remaining) [2024-09-20 13:35:12,772 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-20 13:35:12,961 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-20 13:35:12,964 INFO L408 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:35:12,966 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-20 13:35:12,967 INFO L469 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-09-20 13:35:12,968 INFO L470 ceAbstractionStarter]: WitnessConsidered=2 [2024-09-20 13:35:12,969 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:35:12 BoogieIcfgContainer [2024-09-20 13:35:12,969 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-20 13:35:12,969 INFO L158 Benchmark]: Toolchain (without parser) took 31524.30ms. Allocated memory was 180.4MB in the beginning and 474.0MB in the end (delta: 293.6MB). Free memory was 112.6MB in the beginning and 216.6MB in the end (delta: -103.9MB). Peak memory consumption was 191.2MB. Max. memory is 16.1GB. [2024-09-20 13:35:12,970 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 100.7MB. Free memory is still 69.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 13:35:12,970 INFO L158 Benchmark]: Witness Parser took 0.12ms. Allocated memory is still 180.4MB. Free memory was 114.7MB in the beginning and 114.5MB in the end (delta: 251.8kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 13:35:12,971 INFO L158 Benchmark]: CACSL2BoogieTranslator took 289.71ms. Allocated memory is still 180.4MB. Free memory was 112.4MB in the beginning and 97.1MB in the end (delta: 15.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-09-20 13:35:12,972 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.29ms. Allocated memory is still 180.4MB. Free memory was 97.1MB in the beginning and 95.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 13:35:12,972 INFO L158 Benchmark]: Boogie Preprocessor took 55.12ms. Allocated memory is still 180.4MB. Free memory was 95.1MB in the beginning and 93.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 13:35:12,972 INFO L158 Benchmark]: RCFGBuilder took 596.10ms. Allocated memory is still 180.4MB. Free memory was 93.2MB in the beginning and 140.6MB in the end (delta: -47.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-09-20 13:35:12,973 INFO L158 Benchmark]: TraceAbstraction took 30519.46ms. Allocated memory was 180.4MB in the beginning and 474.0MB in the end (delta: 293.6MB). Free memory was 139.8MB in the beginning and 216.6MB in the end (delta: -76.7MB). Peak memory consumption was 218.7MB. Max. memory is 16.1GB. [2024-09-20 13:35:12,974 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 100.7MB. Free memory is still 69.9MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.12ms. Allocated memory is still 180.4MB. Free memory was 114.7MB in the beginning and 114.5MB in the end (delta: 251.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 289.71ms. Allocated memory is still 180.4MB. Free memory was 112.4MB in the beginning and 97.1MB in the end (delta: 15.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 57.29ms. Allocated memory is still 180.4MB. Free memory was 97.1MB in the beginning and 95.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 55.12ms. Allocated memory is still 180.4MB. Free memory was 95.1MB in the beginning and 93.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 596.10ms. Allocated memory is still 180.4MB. Free memory was 93.2MB in the beginning and 140.6MB in the end (delta: -47.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 30519.46ms. Allocated memory was 180.4MB in the beginning and 474.0MB in the end (delta: 293.6MB). Free memory was 139.8MB in the beginning and 216.6MB in the end (delta: -76.7MB). Peak memory consumption was 218.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 41]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 47]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 10]: procedure precondition always holds For all program executions holds that procedure precondition always holds at this location - PositiveResult [Line: 10]: procedure precondition always holds For all program executions holds that procedure precondition always holds at this location - PositiveResult [Line: 10]: procedure precondition always holds For all program executions holds that procedure precondition always holds at this location - PositiveResult [Line: 10]: procedure precondition always holds For all program executions holds that procedure precondition always holds at this location - PositiveResult [Line: 10]: procedure precondition always holds For all program executions holds that procedure precondition always holds at this location - PositiveResult [Line: 10]: procedure precondition always holds For all program executions holds that procedure precondition always holds at this location - PositiveResult [Line: 7]: procedure postcondition always holds For all program executions holds that procedure postcondition always holds at this location - PositiveResult [Line: 13]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 10]: procedure postcondition always holds For all program executions holds that procedure postcondition always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 44 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 30.5s, OverallIterations: 17, TraceHistogramMax: 17, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 414 SdHoareTripleChecker+Valid, 3.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 333 mSDsluCounter, 2957 SdHoareTripleChecker+Invalid, 2.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2165 mSDsCounter, 302 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2431 IncrementalHoareTripleChecker+Invalid, 2733 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 302 mSolverCounterUnsat, 792 mSDtfsCounter, 2431 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2084 GetRequests, 1890 SyntacticMatches, 5 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 5.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=173occurred in iteration=10, InterpolantAutomatonStates: 138, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 129 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 20.9s InterpolantComputationTime, 2207 NumberOfCodeBlocks, 2080 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 2319 ConstructedInterpolants, 4 QuantifiedInterpolants, 21016 SizeOfPredicates, 47 NumberOfNonLiveVariables, 2312 ConjunctsInSsa, 337 ConjunctsInUnsatCore, 32 InterpolantComputations, 9 PerfectInterpolantSequences, 5592/5880 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 11 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-09-20 13:35:13,007 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...