./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c --full-output --witness-type correctness_witness --validate ../results/automizer-verification-files/SV-COMP24_unreach-call/egcd2-ll_valuebound2.yml/witness-2.1.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5189fb62 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReachWitnessValidation.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c ../results/automizer-verification-files/SV-COMP24_unreach-call/egcd2-ll_valuebound2.yml/witness-2.1.yml -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.positions.where.we.compute.the.hoare.annotation None --- Real Ultimate output --- This is Ultimate 0.2.4-dev-5189fb6-m [2024-09-13 05:36:29,841 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 05:36:29,905 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 05:36:29,912 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 05:36:29,912 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 05:36:29,932 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 05:36:29,933 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 05:36:29,933 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 05:36:29,934 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 05:36:29,934 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 05:36:29,935 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 05:36:29,935 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 05:36:29,936 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 05:36:29,937 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 05:36:29,938 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 05:36:29,938 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 05:36:29,938 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 05:36:29,939 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 05:36:29,939 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 05:36:29,939 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 05:36:29,940 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 05:36:29,943 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 05:36:29,944 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 05:36:29,944 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 05:36:29,944 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 05:36:29,944 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 05:36:29,944 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 05:36:29,945 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 05:36:29,945 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 05:36:29,945 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 05:36:29,945 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 05:36:29,946 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 05:36:29,946 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 05:36:29,946 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 05:36:29,946 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 05:36:29,946 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 05:36:29,947 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 05:36:29,947 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 05:36:29,949 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 05:36:29,949 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 05:36:29,949 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 05:36:29,949 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 05:36:29,950 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> None [2024-09-13 05:36:30,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 05:36:30,246 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 05:36:30,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 05:36:30,250 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-09-13 05:36:30,251 INFO L274 PluginConnector]: Witness Parser initialized [2024-09-13 05:36:30,252 INFO L431 ainManager$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 [2024-09-13 05:36:30,313 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 05:36:30,313 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 05:36:30,313 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c [2024-09-13 05:36:31,618 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 05:36:31,815 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 05:36:31,816 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c [2024-09-13 05:36:31,822 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/5c8c0850b/97729d2b8a5545d3bbdf40555dcd8894/FLAGa3a79ebb4 [2024-09-13 05:36:32,201 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/5c8c0850b/97729d2b8a5545d3bbdf40555dcd8894 [2024-09-13 05:36:32,201 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 05:36:32,202 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-09-13 05:36:32,203 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 05:36:32,204 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 05:36:32,208 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 05:36:32,208 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 13.09 05:36:30" (1/2) ... [2024-09-13 05:36:32,209 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3879e60c and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 05:36:32, skipping insertion in model container [2024-09-13 05:36:32,209 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 13.09 05:36:30" (1/2) ... [2024-09-13 05:36:32,210 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@27aad90e and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 05:36:32, skipping insertion in model container [2024-09-13 05:36:32,210 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 05:36:32" (2/2) ... [2024-09-13 05:36:32,211 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3879e60c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 05:36:32, skipping insertion in model container [2024-09-13 05:36:32,211 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 05:36:32" (2/2) ... [2024-09-13 05:36:32,218 INFO L93 nessWitnessExtractor]: Found the following entries in the witness: [2024-09-13 05:36:32,219 INFO L1541 ArrayList]: Loop invariant at [L47-L56] ((((((((((((((((((r == 0) && (s == 1)) && (a == (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))) [2024-09-13 05:36:32,219 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)) && ((((long long) x * 2) + b) == y)) && (y <= 2)) && (s == 1)) && (((__int128) q + 2) == 0)) && (((__int128) b + 1) <= x)) && (a == x)) && (p == 1))) [2024-09-13 05:36:32,219 INFO L1541 ArrayList]: Function contract at [L7]: requires null, ensures (\old(cond) != 0) [2024-09-13 05:36:32,220 INFO L1541 ArrayList]: Function contract at [L10]: requires (1 <= \old(cond)), ensures (1 <= \old(cond)) [2024-09-13 05:36:32,237 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 05:36:32,372 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c[490,503] [2024-09-13 05:36:32,398 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 05:36:32,404 INFO L200 MainTranslator]: Completed pre-run Start Parsing Global Start Parsing Global Start Parsing Global [2024-09-13 05:36:32,436 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c[490,503] Start Parsing Local Start Parsing Local [2024-09-13 05:36:32,469 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 05:36:32,484 INFO L204 MainTranslator]: Completed translation [2024-09-13 05:36:32,484 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 05:36:32 WrapperNode [2024-09-13 05:36:32,485 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 05:36:32,485 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 05:36:32,486 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 05:36:32,486 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 05:36:32,491 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 05:36:32" (1/1) ... [2024-09-13 05:36:32,497 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 05:36:32" (1/1) ... [2024-09-13 05:36:32,518 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 79 [2024-09-13 05:36:32,520 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 05:36:32,521 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 05:36:32,521 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 05:36:32,522 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 05:36:32,531 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 05:36:32" (1/1) ... [2024-09-13 05:36:32,532 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 05:36:32" (1/1) ... [2024-09-13 05:36:32,533 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 05:36:32" (1/1) ... [2024-09-13 05:36:32,542 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 [2024-09-13 05:36:32,542 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 05:36:32" (1/1) ... [2024-09-13 05:36:32,542 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 05:36:32" (1/1) ... [2024-09-13 05:36:32,549 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 05:36:32" (1/1) ... [2024-09-13 05:36:32,560 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 05:36:32" (1/1) ... [2024-09-13 05:36:32,562 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 05:36:32" (1/1) ... [2024-09-13 05:36:32,563 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 05:36:32" (1/1) ... [2024-09-13 05:36:32,565 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 05:36:32,566 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 05:36:32,566 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 05:36:32,566 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 05:36:32,567 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 05:36:32" (1/1) ... [2024-09-13 05:36:32,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 05:36:32,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 05:36:32,593 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-13 05:36:32,594 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-13 05:36:32,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 05:36:32,628 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-13 05:36:32,628 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-13 05:36:32,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-09-13 05:36:32,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 05:36:32,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 05:36:32,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-13 05:36:32,629 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-13 05:36:32,677 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 05:36:32,678 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 05:36:32,949 WARN L783 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2024-09-13 05:36:32,984 INFO L? ?]: Removed 69 outVars from TransFormulas that were not future-live. [2024-09-13 05:36:32,984 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 05:36:33,005 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 05:36:33,005 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-13 05:36:33,006 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 05:36:33 BoogieIcfgContainer [2024-09-13 05:36:33,006 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 05:36:33,008 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 05:36:33,008 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 05:36:33,011 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 05:36:33,012 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 13.09 05:36:30" (1/4) ... [2024-09-13 05:36:33,012 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af34110 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 13.09 05:36:33, skipping insertion in model container [2024-09-13 05:36:33,013 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 05:36:32" (2/4) ... [2024-09-13 05:36:33,013 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af34110 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 05:36:33, skipping insertion in model container [2024-09-13 05:36:33,013 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 05:36:32" (3/4) ... [2024-09-13 05:36:33,014 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af34110 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 05:36:33, skipping insertion in model container [2024-09-13 05:36:33,014 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 05:36:33" (4/4) ... [2024-09-13 05:36:33,015 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound2.c [2024-09-13 05:36:33,030 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 05:36:33,030 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2024-09-13 05:36:33,115 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 05:36:33,124 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;@41adef32, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 05:36:33,124 INFO L337 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2024-09-13 05:36:33,129 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) [2024-09-13 05:36:33,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-09-13 05:36:33,139 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 05:36:33,139 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-09-13 05:36:33,140 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)] === [2024-09-13 05:36:33,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 05:36:33,148 INFO L85 PathProgramCache]: Analyzing trace with hash 135674271, now seen corresponding path program 1 times [2024-09-13 05:36:33,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 05:36:33,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524902517] [2024-09-13 05:36:33,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 05:36:33,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 05:36:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:33,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 05:36:33,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 05:36:33,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524902517] [2024-09-13 05:36:33,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524902517] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 05:36:33,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 05:36:33,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-13 05:36:33,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712636269] [2024-09-13 05:36:33,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 05:36:33,271 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-13 05:36:33,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 05:36:33,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-13 05:36:33,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-13 05:36:33,296 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) [2024-09-13 05:36:33,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 05:36:33,318 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2024-09-13 05:36:33,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-13 05:36:33,321 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 [2024-09-13 05:36:33,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 05:36:33,327 INFO L225 Difference]: With dead ends: 44 [2024-09-13 05:36:33,327 INFO L226 Difference]: Without dead ends: 42 [2024-09-13 05:36:33,328 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 [2024-09-13 05:36:33,331 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 [2024-09-13 05:36:33,332 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] [2024-09-13 05:36:33,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-13 05:36:33,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-09-13 05:36:33,360 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) [2024-09-13 05:36:33,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2024-09-13 05:36:33,363 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 5 [2024-09-13 05:36:33,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 05:36:33,363 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2024-09-13 05:36:33,363 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) [2024-09-13 05:36:33,363 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2024-09-13 05:36:33,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-09-13 05:36:33,365 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 05:36:33,365 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-09-13 05:36:33,366 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 05:36:33,366 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)] === [2024-09-13 05:36:33,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 05:36:33,366 INFO L85 PathProgramCache]: Analyzing trace with hash 135674333, now seen corresponding path program 1 times [2024-09-13 05:36:33,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 05:36:33,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934821279] [2024-09-13 05:36:33,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 05:36:33,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 05:36:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:33,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 05:36:33,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 05:36:33,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934821279] [2024-09-13 05:36:33,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934821279] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 05:36:33,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 05:36:33,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-13 05:36:33,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377450149] [2024-09-13 05:36:33,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 05:36:33,445 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 05:36:33,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 05:36:33,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 05:36:33,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-13 05:36:33,446 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) [2024-09-13 05:36:33,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 05:36:33,492 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2024-09-13 05:36:33,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-13 05:36:33,492 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 [2024-09-13 05:36:33,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 05:36:33,493 INFO L225 Difference]: With dead ends: 41 [2024-09-13 05:36:33,493 INFO L226 Difference]: Without dead ends: 41 [2024-09-13 05:36:33,493 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 [2024-09-13 05:36:33,494 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, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 05:36:33,495 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 112 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 05:36:33,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-13 05:36:33,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-09-13 05:36:33,500 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) [2024-09-13 05:36:33,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2024-09-13 05:36:33,501 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 5 [2024-09-13 05:36:33,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 05:36:33,502 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2024-09-13 05:36:33,502 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) [2024-09-13 05:36:33,502 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2024-09-13 05:36:33,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-13 05:36:33,503 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 05:36:33,503 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 05:36:33,503 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-13 05:36:33,504 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)] === [2024-09-13 05:36:33,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 05:36:33,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1738672974, now seen corresponding path program 1 times [2024-09-13 05:36:33,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 05:36:33,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698241853] [2024-09-13 05:36:33,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 05:36:33,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 05:36:33,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:34,124 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-13 05:36:34,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:34,157 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-13 05:36:34,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:34,179 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-13 05:36:34,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:34,199 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-13 05:36:34,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:34,218 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 05:36:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:34,240 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-13 05:36:34,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:34,269 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-13 05:36:34,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 05:36:34,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698241853] [2024-09-13 05:36:34,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698241853] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 05:36:34,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745745258] [2024-09-13 05:36:34,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 05:36:34,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 05:36:34,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 05:36:34,274 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 05:36:34,276 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 05:36:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:34,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-13 05:36:34,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 05:36:34,672 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-13 05:36:34,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 05:36:35,131 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-13 05:36:35,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745745258] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 05:36:35,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 05:36:35,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-09-13 05:36:35,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301197878] [2024-09-13 05:36:35,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 05:36:35,132 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-13 05:36:35,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 05:36:35,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-13 05:36:35,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-09-13 05:36:35,136 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) [2024-09-13 05:36:35,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 05:36:35,395 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2024-09-13 05:36:35,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-13 05:36:35,395 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 [2024-09-13 05:36:35,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 05:36:35,396 INFO L225 Difference]: With dead ends: 54 [2024-09-13 05:36:35,397 INFO L226 Difference]: Without dead ends: 54 [2024-09-13 05:36:35,397 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 [2024-09-13 05:36:35,398 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 [2024-09-13 05:36:35,398 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] [2024-09-13 05:36:35,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-13 05:36:35,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2024-09-13 05:36:35,408 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) [2024-09-13 05:36:35,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2024-09-13 05:36:35,409 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 34 [2024-09-13 05:36:35,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 05:36:35,410 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2024-09-13 05:36:35,411 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) [2024-09-13 05:36:35,411 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2024-09-13 05:36:35,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-13 05:36:35,412 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 05:36:35,412 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] [2024-09-13 05:36:35,429 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-13 05:36:35,616 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 [2024-09-13 05:36:35,617 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)] === [2024-09-13 05:36:35,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 05:36:35,618 INFO L85 PathProgramCache]: Analyzing trace with hash -498970520, now seen corresponding path program 1 times [2024-09-13 05:36:35,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 05:36:35,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545955561] [2024-09-13 05:36:35,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 05:36:35,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 05:36:35,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:36,060 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-13 05:36:36,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:36,064 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-13 05:36:36,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:36,068 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-13 05:36:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:36,070 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-13 05:36:36,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:36,073 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 05:36:36,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:36,087 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-13 05:36:36,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:36,098 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-13 05:36:36,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 05:36:36,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545955561] [2024-09-13 05:36:36,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545955561] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 05:36:36,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 05:36:36,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-13 05:36:36,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148480377] [2024-09-13 05:36:36,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 05:36:36,099 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 05:36:36,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 05:36:36,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 05:36:36,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-13 05:36:36,102 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) [2024-09-13 05:36:36,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 05:36:36,258 INFO L93 Difference]: Finished difference Result 60 states and 83 transitions. [2024-09-13 05:36:36,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 05:36:36,259 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 [2024-09-13 05:36:36,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 05:36:36,260 INFO L225 Difference]: With dead ends: 60 [2024-09-13 05:36:36,260 INFO L226 Difference]: Without dead ends: 60 [2024-09-13 05:36:36,260 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 [2024-09-13 05:36:36,261 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 [2024-09-13 05:36:36,262 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] [2024-09-13 05:36:36,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-13 05:36:36,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2024-09-13 05:36:36,270 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) [2024-09-13 05:36:36,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 73 transitions. [2024-09-13 05:36:36,272 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 73 transitions. Word has length 37 [2024-09-13 05:36:36,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 05:36:36,274 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 73 transitions. [2024-09-13 05:36:36,274 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) [2024-09-13 05:36:36,274 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 73 transitions. [2024-09-13 05:36:36,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-13 05:36:36,275 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 05:36:36,275 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] [2024-09-13 05:36:36,275 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-13 05:36:36,275 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)] === [2024-09-13 05:36:36,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 05:36:36,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1880432174, now seen corresponding path program 1 times [2024-09-13 05:36:36,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 05:36:36,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657305749] [2024-09-13 05:36:36,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 05:36:36,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 05:36:36,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:36,314 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-13 05:36:36,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:36,318 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-13 05:36:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:36,323 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-13 05:36:36,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:36,325 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-13 05:36:36,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:36,326 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 05:36:36,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:36,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-13 05:36:36,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:36,330 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-13 05:36:36,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 05:36:36,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657305749] [2024-09-13 05:36:36,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657305749] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 05:36:36,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 05:36:36,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-13 05:36:36,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326399850] [2024-09-13 05:36:36,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 05:36:36,331 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-13 05:36:36,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 05:36:36,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-13 05:36:36,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-13 05:36:36,332 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) [2024-09-13 05:36:36,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 05:36:36,357 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2024-09-13 05:36:36,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-13 05:36:36,358 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 [2024-09-13 05:36:36,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 05:36:36,360 INFO L225 Difference]: With dead ends: 53 [2024-09-13 05:36:36,360 INFO L226 Difference]: Without dead ends: 53 [2024-09-13 05:36:36,360 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 [2024-09-13 05:36:36,361 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 [2024-09-13 05:36:36,361 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] [2024-09-13 05:36:36,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-13 05:36:36,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-09-13 05:36:36,366 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) [2024-09-13 05:36:36,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2024-09-13 05:36:36,367 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 72 transitions. Word has length 42 [2024-09-13 05:36:36,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 05:36:36,367 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 72 transitions. [2024-09-13 05:36:36,368 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) [2024-09-13 05:36:36,368 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 72 transitions. [2024-09-13 05:36:36,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-13 05:36:36,369 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 05:36:36,369 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] [2024-09-13 05:36:36,369 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-13 05:36:36,369 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)] === [2024-09-13 05:36:36,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 05:36:36,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1880432013, now seen corresponding path program 1 times [2024-09-13 05:36:36,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 05:36:36,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701849236] [2024-09-13 05:36:36,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 05:36:36,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 05:36:36,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:36,428 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-13 05:36:36,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:36,431 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-13 05:36:36,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:36,433 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-13 05:36:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:36,434 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-13 05:36:36,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:36,436 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 05:36:36,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:36,438 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-13 05:36:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:36,440 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-13 05:36:36,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 05:36:36,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701849236] [2024-09-13 05:36:36,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701849236] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 05:36:36,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 05:36:36,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-13 05:36:36,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990746392] [2024-09-13 05:36:36,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 05:36:36,441 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-13 05:36:36,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 05:36:36,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-13 05:36:36,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-13 05:36:36,442 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) [2024-09-13 05:36:36,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 05:36:36,453 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2024-09-13 05:36:36,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-13 05:36:36,453 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 [2024-09-13 05:36:36,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 05:36:36,454 INFO L225 Difference]: With dead ends: 51 [2024-09-13 05:36:36,454 INFO L226 Difference]: Without dead ends: 51 [2024-09-13 05:36:36,454 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 [2024-09-13 05:36:36,455 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 [2024-09-13 05:36:36,455 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] [2024-09-13 05:36:36,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-13 05:36:36,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-09-13 05:36:36,462 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) [2024-09-13 05:36:36,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2024-09-13 05:36:36,466 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 42 [2024-09-13 05:36:36,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 05:36:36,466 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2024-09-13 05:36:36,466 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) [2024-09-13 05:36:36,466 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2024-09-13 05:36:36,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-13 05:36:36,469 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 05:36:36,469 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] [2024-09-13 05:36:36,469 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-13 05:36:36,469 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)] === [2024-09-13 05:36:36,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 05:36:36,469 INFO L85 PathProgramCache]: Analyzing trace with hash 837542670, now seen corresponding path program 1 times [2024-09-13 05:36:36,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 05:36:36,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675828925] [2024-09-13 05:36:36,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 05:36:36,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 05:36:36,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:37,023 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-13 05:36:37,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:37,027 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-13 05:36:37,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:37,029 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-13 05:36:37,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:37,031 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-13 05:36:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:37,034 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 05:36:37,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:37,043 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-13 05:36:37,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:37,050 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-13 05:36:37,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:37,064 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-13 05:36:37,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:37,081 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-13 05:36:37,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:37,099 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-13 05:36:37,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:37,115 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 05:36:37,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 05:36:37,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675828925] [2024-09-13 05:36:37,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675828925] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 05:36:37,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385566191] [2024-09-13 05:36:37,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 05:36:37,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 05:36:37,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 05:36:37,120 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 05:36:37,121 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 05:36:37,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:37,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-13 05:36:37,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 05:36:37,835 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 05:36:37,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 05:36:38,627 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 05:36:38,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385566191] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 05:36:38,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 05:36:38,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-09-13 05:36:38,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394780174] [2024-09-13 05:36:38,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 05:36:38,630 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-13 05:36:38,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 05:36:38,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-13 05:36:38,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2024-09-13 05:36:38,634 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) [2024-09-13 05:36:39,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 05:36:39,043 INFO L93 Difference]: Finished difference Result 84 states and 125 transitions. [2024-09-13 05:36:39,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-13 05:36:39,044 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 [2024-09-13 05:36:39,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 05:36:39,046 INFO L225 Difference]: With dead ends: 84 [2024-09-13 05:36:39,046 INFO L226 Difference]: Without dead ends: 84 [2024-09-13 05:36:39,046 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 [2024-09-13 05:36:39,047 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 [2024-09-13 05:36:39,047 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] [2024-09-13 05:36:39,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-09-13 05:36:39,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 62. [2024-09-13 05:36:39,053 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) [2024-09-13 05:36:39,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 87 transitions. [2024-09-13 05:36:39,054 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 87 transitions. Word has length 60 [2024-09-13 05:36:39,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 05:36:39,054 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 87 transitions. [2024-09-13 05:36:39,055 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) [2024-09-13 05:36:39,055 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 87 transitions. [2024-09-13 05:36:39,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-13 05:36:39,056 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 05:36:39,056 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] [2024-09-13 05:36:39,072 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-13 05:36:39,256 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 [2024-09-13 05:36:39,256 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)] === [2024-09-13 05:36:39,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 05:36:39,257 INFO L85 PathProgramCache]: Analyzing trace with hash 194017890, now seen corresponding path program 1 times [2024-09-13 05:36:39,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 05:36:39,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892222150] [2024-09-13 05:36:39,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 05:36:39,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 05:36:39,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 05:36:39,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1395974519] [2024-09-13 05:36:39,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 05:36:39,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 05:36:39,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 05:36:39,287 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 05:36:39,290 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-13 05:36:39,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:39,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-13 05:36:39,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 05:36:40,035 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 05:36:40,036 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 05:36:40,616 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 05:36:40,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 05:36:40,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892222150] [2024-09-13 05:36:40,617 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 05:36:40,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395974519] [2024-09-13 05:36:40,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395974519] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-13 05:36:40,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 05:36:40,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-09-13 05:36:40,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871433004] [2024-09-13 05:36:40,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 05:36:40,619 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-13 05:36:40,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 05:36:40,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-13 05:36:40,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-09-13 05:36:40,620 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) [2024-09-13 05:36:40,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 05:36:40,909 INFO L93 Difference]: Finished difference Result 95 states and 150 transitions. [2024-09-13 05:36:40,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-13 05:36:40,909 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 [2024-09-13 05:36:40,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 05:36:40,910 INFO L225 Difference]: With dead ends: 95 [2024-09-13 05:36:40,910 INFO L226 Difference]: Without dead ends: 95 [2024-09-13 05:36:40,911 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 [2024-09-13 05:36:40,911 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 [2024-09-13 05:36:40,912 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] [2024-09-13 05:36:40,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-09-13 05:36:40,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2024-09-13 05:36:40,919 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) [2024-09-13 05:36:40,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 149 transitions. [2024-09-13 05:36:40,920 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 149 transitions. Word has length 61 [2024-09-13 05:36:40,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 05:36:40,920 INFO L474 AbstractCegarLoop]: Abstraction has 94 states and 149 transitions. [2024-09-13 05:36:40,920 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) [2024-09-13 05:36:40,920 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 149 transitions. [2024-09-13 05:36:40,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-13 05:36:40,921 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 05:36:40,921 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] [2024-09-13 05:36:40,936 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-13 05:36:41,125 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 [2024-09-13 05:36:41,126 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)] === [2024-09-13 05:36:41,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 05:36:41,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1038968620, now seen corresponding path program 1 times [2024-09-13 05:36:41,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 05:36:41,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089627951] [2024-09-13 05:36:41,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 05:36:41,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 05:36:41,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 05:36:41,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699355843] [2024-09-13 05:36:41,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 05:36:41,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 05:36:41,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 05:36:41,148 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 05:36:41,152 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-13 05:36:41,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:41,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-13 05:36:41,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 05:36:41,788 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 05:36:41,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 05:36:42,402 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 05:36:42,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 05:36:42,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089627951] [2024-09-13 05:36:42,403 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 05:36:42,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699355843] [2024-09-13 05:36:42,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699355843] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-13 05:36:42,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 05:36:42,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2024-09-13 05:36:42,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326696231] [2024-09-13 05:36:42,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 05:36:42,404 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 05:36:42,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 05:36:42,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 05:36:42,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-09-13 05:36:42,405 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) [2024-09-13 05:36:42,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 05:36:42,901 INFO L93 Difference]: Finished difference Result 128 states and 213 transitions. [2024-09-13 05:36:42,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-13 05:36:42,902 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 [2024-09-13 05:36:42,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 05:36:42,903 INFO L225 Difference]: With dead ends: 128 [2024-09-13 05:36:42,903 INFO L226 Difference]: Without dead ends: 128 [2024-09-13 05:36:42,903 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2024-09-13 05:36:42,904 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 [2024-09-13 05:36:42,904 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] [2024-09-13 05:36:42,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-09-13 05:36:42,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 119. [2024-09-13 05:36:42,916 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) [2024-09-13 05:36:42,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 195 transitions. [2024-09-13 05:36:42,917 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 195 transitions. Word has length 64 [2024-09-13 05:36:42,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 05:36:42,917 INFO L474 AbstractCegarLoop]: Abstraction has 119 states and 195 transitions. [2024-09-13 05:36:42,918 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) [2024-09-13 05:36:42,918 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 195 transitions. [2024-09-13 05:36:42,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-09-13 05:36:42,919 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 05:36:42,919 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] [2024-09-13 05:36:42,935 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-13 05:36:43,122 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 [2024-09-13 05:36:43,123 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)] === [2024-09-13 05:36:43,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 05:36:43,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1600080472, now seen corresponding path program 2 times [2024-09-13 05:36:43,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 05:36:43,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238632868] [2024-09-13 05:36:43,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 05:36:43,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 05:36:43,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 05:36:43,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1072088492] [2024-09-13 05:36:43,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 05:36:43,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 05:36:43,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 05:36:43,151 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 05:36:43,153 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-13 05:36:43,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 05:36:43,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 05:36:43,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-13 05:36:43,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 05:36:43,949 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-13 05:36:43,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 05:36:45,191 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-13 05:36:45,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 05:36:45,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238632868] [2024-09-13 05:36:45,191 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 05:36:45,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072088492] [2024-09-13 05:36:45,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072088492] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 05:36:45,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 05:36:45,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2024-09-13 05:36:45,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143671693] [2024-09-13 05:36:45,192 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 05:36:45,192 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-13 05:36:45,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 05:36:45,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-13 05:36:45,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2024-09-13 05:36:45,193 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) [2024-09-13 05:36:45,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 05:36:45,612 INFO L93 Difference]: Finished difference Result 193 states and 319 transitions. [2024-09-13 05:36:45,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-13 05:36:45,614 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 [2024-09-13 05:36:45,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 05:36:45,615 INFO L225 Difference]: With dead ends: 193 [2024-09-13 05:36:45,615 INFO L226 Difference]: Without dead ends: 193 [2024-09-13 05:36:45,615 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 [2024-09-13 05:36:45,616 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 [2024-09-13 05:36:45,616 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] [2024-09-13 05:36:45,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-09-13 05:36:45,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 173. [2024-09-13 05:36:45,632 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) [2024-09-13 05:36:45,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 292 transitions. [2024-09-13 05:36:45,634 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 292 transitions. Word has length 83 [2024-09-13 05:36:45,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 05:36:45,634 INFO L474 AbstractCegarLoop]: Abstraction has 173 states and 292 transitions. [2024-09-13 05:36:45,634 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) [2024-09-13 05:36:45,634 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 292 transitions. [2024-09-13 05:36:45,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-09-13 05:36:45,635 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 05:36:45,635 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] [2024-09-13 05:36:45,649 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-13 05:36:45,839 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 [2024-09-13 05:36:45,840 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)] === [2024-09-13 05:36:45,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 05:36:45,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1937111816, now seen corresponding path program 1 times [2024-09-13 05:36:45,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 05:36:45,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692682785] [2024-09-13 05:36:45,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 05:36:45,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 05:36:45,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 05:36:45,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1025897730] [2024-09-13 05:36:45,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 05:36:45,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 05:36:45,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 05:36:45,873 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 05:36:45,875 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-13 05:36:45,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:45,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-13 05:36:45,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 05:36:46,499 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-13 05:36:46,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 05:36:47,436 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-13 05:36:47,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 05:36:47,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692682785] [2024-09-13 05:36:47,436 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 05:36:47,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025897730] [2024-09-13 05:36:47,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025897730] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 05:36:47,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 05:36:47,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2024-09-13 05:36:47,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042337191] [2024-09-13 05:36:47,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 05:36:47,437 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-13 05:36:47,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 05:36:47,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-13 05:36:47,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-09-13 05:36:47,438 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) [2024-09-13 05:36:48,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 05:36:48,279 INFO L93 Difference]: Finished difference Result 118 states and 180 transitions. [2024-09-13 05:36:48,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-13 05:36:48,279 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 [2024-09-13 05:36:48,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 05:36:48,280 INFO L225 Difference]: With dead ends: 118 [2024-09-13 05:36:48,280 INFO L226 Difference]: Without dead ends: 118 [2024-09-13 05:36:48,280 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 [2024-09-13 05:36:48,281 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 34 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.5s IncrementalHoareTripleChecker+Time [2024-09-13 05:36:48,281 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 282 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-13 05:36:48,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-09-13 05:36:48,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 105. [2024-09-13 05:36:48,287 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) [2024-09-13 05:36:48,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 167 transitions. [2024-09-13 05:36:48,288 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 167 transitions. Word has length 84 [2024-09-13 05:36:48,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 05:36:48,288 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 167 transitions. [2024-09-13 05:36:48,289 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) [2024-09-13 05:36:48,289 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 167 transitions. [2024-09-13 05:36:48,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-13 05:36:48,290 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 05:36:48,290 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] [2024-09-13 05:36:48,306 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-13 05:36:48,490 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 [2024-09-13 05:36:48,491 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)] === [2024-09-13 05:36:48,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 05:36:48,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1223876898, now seen corresponding path program 1 times [2024-09-13 05:36:48,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 05:36:48,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273209832] [2024-09-13 05:36:48,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 05:36:48,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 05:36:48,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:49,362 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-13 05:36:49,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:49,364 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-13 05:36:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:49,366 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-13 05:36:49,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:49,367 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-13 05:36:49,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:49,368 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 05:36:49,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:49,372 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-13 05:36:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:49,375 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-13 05:36:49,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:49,380 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-13 05:36:49,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:49,386 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-13 05:36:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:49,392 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-13 05:36:49,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:49,398 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-13 05:36:49,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:49,407 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-13 05:36:49,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:49,415 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-13 05:36:49,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:49,424 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-13 05:36:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:49,434 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-13 05:36:49,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 05:36:49,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273209832] [2024-09-13 05:36:49,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273209832] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 05:36:49,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757656022] [2024-09-13 05:36:49,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 05:36:49,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 05:36:49,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 05:36:49,436 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 05:36:49,448 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-13 05:36:49,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:49,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-13 05:36:49,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 05:36:50,262 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-13 05:36:50,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 05:36:51,334 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-13 05:36:51,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757656022] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 05:36:51,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 05:36:51,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2024-09-13 05:36:51,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956275817] [2024-09-13 05:36:51,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 05:36:51,335 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-13 05:36:51,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 05:36:51,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-13 05:36:51,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2024-09-13 05:36:51,336 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) [2024-09-13 05:36:51,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 05:36:51,988 INFO L93 Difference]: Finished difference Result 116 states and 178 transitions. [2024-09-13 05:36:51,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-13 05:36:51,989 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 [2024-09-13 05:36:51,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 05:36:51,990 INFO L225 Difference]: With dead ends: 116 [2024-09-13 05:36:51,990 INFO L226 Difference]: Without dead ends: 116 [2024-09-13 05:36:51,990 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 [2024-09-13 05:36:51,991 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 [2024-09-13 05:36:51,991 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] [2024-09-13 05:36:51,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-09-13 05:36:51,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 82. [2024-09-13 05:36:51,996 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) [2024-09-13 05:36:51,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 115 transitions. [2024-09-13 05:36:51,997 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 115 transitions. Word has length 87 [2024-09-13 05:36:51,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 05:36:51,998 INFO L474 AbstractCegarLoop]: Abstraction has 82 states and 115 transitions. [2024-09-13 05:36:51,998 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) [2024-09-13 05:36:51,998 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 115 transitions. [2024-09-13 05:36:51,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-13 05:36:51,999 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 05:36:51,999 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] [2024-09-13 05:36:52,017 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-13 05:36:52,203 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 [2024-09-13 05:36:52,204 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)] === [2024-09-13 05:36:52,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 05:36:52,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1317572175, now seen corresponding path program 1 times [2024-09-13 05:36:52,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 05:36:52,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954727000] [2024-09-13 05:36:52,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 05:36:52,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 05:36:52,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:52,448 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-13 05:36:52,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:52,450 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-13 05:36:52,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:52,452 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-13 05:36:52,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:52,453 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-13 05:36:52,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:52,455 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 05:36:52,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:52,457 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-13 05:36:52,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:52,459 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-13 05:36:52,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:52,462 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-13 05:36:52,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:52,466 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-13 05:36:52,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:52,470 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-13 05:36:52,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:52,476 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-13 05:36:52,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:52,481 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-13 05:36:52,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:52,485 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-13 05:36:52,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:52,489 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-13 05:36:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:52,498 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2024-09-13 05:36:52,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 05:36:52,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954727000] [2024-09-13 05:36:52,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954727000] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 05:36:52,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933452595] [2024-09-13 05:36:52,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 05:36:52,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 05:36:52,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 05:36:52,501 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 05:36:52,502 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-13 05:36:52,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:52,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-13 05:36:52,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 05:36:52,842 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-13 05:36:52,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 05:36:52,931 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-13 05:36:52,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933452595] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-13 05:36:52,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-13 05:36:52,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 6] total 13 [2024-09-13 05:36:52,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483872510] [2024-09-13 05:36:52,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 05:36:52,932 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 05:36:52,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 05:36:52,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 05:36:52,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-09-13 05:36:52,933 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) [2024-09-13 05:36:52,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 05:36:52,993 INFO L93 Difference]: Finished difference Result 81 states and 114 transitions. [2024-09-13 05:36:52,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-13 05:36:52,993 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 [2024-09-13 05:36:52,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 05:36:52,994 INFO L225 Difference]: With dead ends: 81 [2024-09-13 05:36:52,994 INFO L226 Difference]: Without dead ends: 81 [2024-09-13 05:36:52,994 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 [2024-09-13 05:36:52,994 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 [2024-09-13 05:36:52,995 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] [2024-09-13 05:36:52,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-13 05:36:52,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-09-13 05:36:52,998 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) [2024-09-13 05:36:52,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 114 transitions. [2024-09-13 05:36:52,999 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 114 transitions. Word has length 87 [2024-09-13 05:36:52,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 05:36:53,000 INFO L474 AbstractCegarLoop]: Abstraction has 81 states and 114 transitions. [2024-09-13 05:36:53,000 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) [2024-09-13 05:36:53,000 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 114 transitions. [2024-09-13 05:36:53,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-09-13 05:36:53,001 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 05:36:53,001 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] [2024-09-13 05:36:53,016 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-13 05:36:53,205 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 [2024-09-13 05:36:53,206 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)] === [2024-09-13 05:36:53,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 05:36:53,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1215787035, now seen corresponding path program 1 times [2024-09-13 05:36:53,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 05:36:53,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259118077] [2024-09-13 05:36:53,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 05:36:53,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 05:36:53,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 05:36:53,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510165656] [2024-09-13 05:36:53,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 05:36:53,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 05:36:53,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 05:36:53,226 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 05:36:53,227 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-13 05:36:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:53,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-13 05:36:53,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 05:36:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2024-09-13 05:36:53,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 05:36:53,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 05:36:53,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259118077] [2024-09-13 05:36:53,448 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 05:36:53,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510165656] [2024-09-13 05:36:53,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510165656] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 05:36:53,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 05:36:53,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2024-09-13 05:36:53,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687844409] [2024-09-13 05:36:53,448 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 05:36:53,448 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 05:36:53,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 05:36:53,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 05:36:53,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-13 05:36:53,449 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) [2024-09-13 05:36:53,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 05:36:53,554 INFO L93 Difference]: Finished difference Result 104 states and 152 transitions. [2024-09-13 05:36:53,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-13 05:36:53,555 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 [2024-09-13 05:36:53,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 05:36:53,555 INFO L225 Difference]: With dead ends: 104 [2024-09-13 05:36:53,556 INFO L226 Difference]: Without dead ends: 84 [2024-09-13 05:36:53,556 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 [2024-09-13 05:36:53,556 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 [2024-09-13 05:36:53,556 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] [2024-09-13 05:36:53,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-09-13 05:36:53,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 63. [2024-09-13 05:36:53,561 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) [2024-09-13 05:36:53,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 86 transitions. [2024-09-13 05:36:53,561 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 86 transitions. Word has length 92 [2024-09-13 05:36:53,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 05:36:53,562 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 86 transitions. [2024-09-13 05:36:53,562 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) [2024-09-13 05:36:53,562 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 86 transitions. [2024-09-13 05:36:53,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-09-13 05:36:53,563 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 05:36:53,563 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] [2024-09-13 05:36:53,582 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-13 05:36:53,763 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 [2024-09-13 05:36:53,763 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)] === [2024-09-13 05:36:53,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 05:36:53,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1052451092, now seen corresponding path program 2 times [2024-09-13 05:36:53,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 05:36:53,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045472639] [2024-09-13 05:36:53,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 05:36:53,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 05:36:53,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:54,557 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-13 05:36:54,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:54,559 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-13 05:36:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:54,561 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-13 05:36:54,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:54,562 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-13 05:36:54,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:54,563 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 05:36:54,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:54,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-13 05:36:54,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:54,570 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-13 05:36:54,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:54,576 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-13 05:36:54,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:54,583 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-13 05:36:54,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:54,588 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-13 05:36:54,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:54,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-13 05:36:54,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:54,605 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-13 05:36:54,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:54,616 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-13 05:36:54,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:54,625 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-13 05:36:54,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:54,634 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-13 05:36:54,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:54,643 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-13 05:36:54,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:54,654 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-09-13 05:36:54,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:54,663 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-13 05:36:54,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 05:36:54,675 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2024-09-13 05:36:54,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 05:36:54,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045472639] [2024-09-13 05:36:54,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045472639] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 05:36:54,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909894453] [2024-09-13 05:36:54,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 05:36:54,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 05:36:54,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 05:36:54,679 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 05:36:54,680 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-13 05:36:54,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 05:36:54,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 05:36:54,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-13 05:36:54,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 05:36:55,693 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2024-09-13 05:36:55,693 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 05:36:58,488 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2024-09-13 05:36:58,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909894453] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 05:36:58,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 05:36:58,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2024-09-13 05:36:58,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056296242] [2024-09-13 05:36:58,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 05:36:58,489 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-13 05:36:58,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 05:36:58,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-13 05:36:58,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2024-09-13 05:36:58,490 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) [2024-09-13 05:36:59,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 05:36:59,210 INFO L93 Difference]: Finished difference Result 68 states and 92 transitions. [2024-09-13 05:36:59,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-13 05:36:59,210 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 [2024-09-13 05:36:59,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 05:36:59,211 INFO L225 Difference]: With dead ends: 68 [2024-09-13 05:36:59,211 INFO L226 Difference]: Without dead ends: 62 [2024-09-13 05:36:59,211 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2024-09-13 05:36:59,212 INFO L434 NwaCegarLoop]: 69 mSDtfsCounter, 37 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2024-09-13 05:36:59,212 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] [2024-09-13 05:36:59,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-09-13 05:36:59,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-09-13 05:36:59,215 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) [2024-09-13 05:36:59,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 82 transitions. [2024-09-13 05:36:59,215 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 82 transitions. Word has length 110 [2024-09-13 05:36:59,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 05:36:59,216 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 82 transitions. [2024-09-13 05:36:59,216 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) [2024-09-13 05:36:59,216 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 82 transitions. [2024-09-13 05:36:59,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-09-13 05:36:59,218 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 05:36:59,218 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] [2024-09-13 05:36:59,235 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-13 05:36:59,421 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 [2024-09-13 05:36:59,422 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)] === [2024-09-13 05:36:59,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 05:36:59,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1894971634, now seen corresponding path program 2 times [2024-09-13 05:36:59,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 05:36:59,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96819498] [2024-09-13 05:36:59,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 05:36:59,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 05:36:59,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 05:36:59,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [855154221] [2024-09-13 05:36:59,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 05:36:59,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 05:36:59,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 05:36:59,461 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 05:36:59,462 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-13 05:36:59,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 05:36:59,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 05:36:59,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-13 05:36:59,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 05:37:00,392 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2024-09-13 05:37:00,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 05:37:01,461 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2024-09-13 05:37:01,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 05:37:01,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96819498] [2024-09-13 05:37:01,461 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 05:37:01,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855154221] [2024-09-13 05:37:01,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855154221] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 05:37:01,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 05:37:01,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2024-09-13 05:37:01,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205620043] [2024-09-13 05:37:01,462 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 05:37:01,463 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-13 05:37:01,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 05:37:01,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-13 05:37:01,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2024-09-13 05:37:01,464 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) [2024-09-13 05:37:01,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 05:37:01,770 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2024-09-13 05:37:01,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-13 05:37:01,770 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 [2024-09-13 05:37:01,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 05:37:01,771 INFO L225 Difference]: With dead ends: 59 [2024-09-13 05:37:01,771 INFO L226 Difference]: Without dead ends: 59 [2024-09-13 05:37:01,771 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 [2024-09-13 05:37:01,772 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 [2024-09-13 05:37:01,772 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] [2024-09-13 05:37:01,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-13 05:37:01,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-09-13 05:37:01,774 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) [2024-09-13 05:37:01,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 79 transitions. [2024-09-13 05:37:01,775 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 79 transitions. Word has length 134 [2024-09-13 05:37:01,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 05:37:01,775 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 79 transitions. [2024-09-13 05:37:01,775 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) [2024-09-13 05:37:01,775 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 79 transitions. [2024-09-13 05:37:01,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-09-13 05:37:01,777 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 05:37:01,777 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] [2024-09-13 05:37:01,792 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-13 05:37:01,980 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 [2024-09-13 05:37:01,981 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)] === [2024-09-13 05:37:01,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 05:37:01,981 INFO L85 PathProgramCache]: Analyzing trace with hash -85051925, now seen corresponding path program 2 times [2024-09-13 05:37:01,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 05:37:01,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132004056] [2024-09-13 05:37:01,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 05:37:01,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 05:37:02,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 05:37:02,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [687688594] [2024-09-13 05:37:02,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 05:37:02,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 05:37:02,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 05:37:02,007 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 05:37:02,009 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-13 05:37:02,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-09-13 05:37:02,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 05:37:02,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-09-13 05:37:02,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 05:37:02,352 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2024-09-13 05:37:02,352 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 05:37:02,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 05:37:02,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132004056] [2024-09-13 05:37:02,352 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 05:37:02,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687688594] [2024-09-13 05:37:02,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687688594] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 05:37:02,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 05:37:02,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-13 05:37:02,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506748559] [2024-09-13 05:37:02,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 05:37:02,353 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 05:37:02,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 05:37:02,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 05:37:02,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-13 05:37:02,354 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) [2024-09-13 05:37:02,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 05:37:02,410 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2024-09-13 05:37:02,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-13 05:37:02,410 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 [2024-09-13 05:37:02,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 05:37:02,411 INFO L225 Difference]: With dead ends: 58 [2024-09-13 05:37:02,411 INFO L226 Difference]: Without dead ends: 0 [2024-09-13 05:37:02,411 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 [2024-09-13 05:37:02,411 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 [2024-09-13 05:37:02,412 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] [2024-09-13 05:37:02,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-13 05:37:02,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-13 05:37:02,412 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) [2024-09-13 05:37:02,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-13 05:37:02,412 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 142 [2024-09-13 05:37:02,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 05:37:02,412 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-13 05:37:02,412 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) [2024-09-13 05:37:02,412 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-13 05:37:02,412 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-13 05:37:02,414 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 11 remaining) [2024-09-13 05:37:02,415 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 11 remaining) [2024-09-13 05:37:02,415 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (8 of 11 remaining) [2024-09-13 05:37:02,415 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONPRE_CONDITION (7 of 11 remaining) [2024-09-13 05:37:02,415 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONPRE_CONDITION (6 of 11 remaining) [2024-09-13 05:37:02,415 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONPRE_CONDITION (5 of 11 remaining) [2024-09-13 05:37:02,415 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONPRE_CONDITION (4 of 11 remaining) [2024-09-13 05:37:02,415 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONPRE_CONDITION (3 of 11 remaining) [2024-09-13 05:37:02,415 INFO L785 garLoopResultBuilder]: Registering result SAFE for location assume_abort_if_notErr0ENSURES_VIOLATIONPOST_CONDITION (2 of 11 remaining) [2024-09-13 05:37:02,415 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 11 remaining) [2024-09-13 05:37:02,415 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr1ENSURES_VIOLATIONPOST_CONDITION (0 of 11 remaining) [2024-09-13 05:37:02,427 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-13 05:37:02,616 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 [2024-09-13 05:37:02,619 INFO L408 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 05:37:02,620 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-13 05:37:02,621 INFO L469 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-09-13 05:37:02,621 INFO L470 ceAbstractionStarter]: WitnessConsidered=2 [2024-09-13 05:37:02,622 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.09 05:37:02 BoogieIcfgContainer [2024-09-13 05:37:02,622 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-13 05:37:02,622 INFO L158 Benchmark]: Toolchain (without parser) took 30420.22ms. Allocated memory was 167.8MB in the beginning and 509.6MB in the end (delta: 341.8MB). Free memory was 136.1MB in the beginning and 362.7MB in the end (delta: -226.6MB). Peak memory consumption was 115.2MB. Max. memory is 16.1GB. [2024-09-13 05:37:02,623 INFO L158 Benchmark]: Witness Parser took 0.18ms. Allocated memory is still 117.4MB. Free memory was 90.8MB in the beginning and 90.7MB in the end (delta: 159.5kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 05:37:02,623 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 117.4MB. Free memory is still 88.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 05:37:02,623 INFO L158 Benchmark]: CACSL2BoogieTranslator took 281.51ms. Allocated memory is still 167.8MB. Free memory was 136.1MB in the beginning and 120.9MB in the end (delta: 15.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-09-13 05:37:02,623 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.51ms. Allocated memory is still 167.8MB. Free memory was 120.9MB in the beginning and 118.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-13 05:37:02,623 INFO L158 Benchmark]: Boogie Preprocessor took 44.02ms. Allocated memory is still 167.8MB. Free memory was 118.8MB in the beginning and 117.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-13 05:37:02,624 INFO L158 Benchmark]: RCFGBuilder took 440.39ms. Allocated memory is still 167.8MB. Free memory was 117.7MB in the beginning and 96.7MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-09-13 05:37:02,624 INFO L158 Benchmark]: TraceAbstraction took 29614.07ms. Allocated memory was 167.8MB in the beginning and 509.6MB in the end (delta: 341.8MB). Free memory was 95.7MB in the beginning and 362.7MB in the end (delta: -267.0MB). Peak memory consumption was 75.4MB. Max. memory is 16.1GB. [2024-09-13 05:37:02,625 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.18ms. Allocated memory is still 117.4MB. Free memory was 90.8MB in the beginning and 90.7MB in the end (delta: 159.5kB). There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.11ms. Allocated memory is still 117.4MB. Free memory is still 88.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 281.51ms. Allocated memory is still 167.8MB. Free memory was 136.1MB in the beginning and 120.9MB in the end (delta: 15.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.51ms. Allocated memory is still 167.8MB. Free memory was 120.9MB in the beginning and 118.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.02ms. Allocated memory is still 167.8MB. Free memory was 118.8MB in the beginning and 117.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 440.39ms. Allocated memory is still 167.8MB. Free memory was 117.7MB in the beginning and 96.7MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 29614.07ms. Allocated memory was 167.8MB in the beginning and 509.6MB in the end (delta: 341.8MB). Free memory was 95.7MB in the beginning and 362.7MB in the end (delta: -267.0MB). Peak memory consumption was 75.4MB. 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: 29.5s, OverallIterations: 17, TraceHistogramMax: 17, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 5.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 414 SdHoareTripleChecker+Valid, 2.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 333 mSDsluCounter, 2957 SdHoareTripleChecker+Invalid, 2.6s 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, 5.6s 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, 20.5s 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! [2024-09-13 05:37:02,656 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE