./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i20_o20-1.c --full-output --witness-type correctness_witness --validate ../results/automizer-verification-files/SV-COMP24_unreach-call/id_i20_o20-1.yml/witness-2.1.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5189fb62 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReachWitnessValidation.xml -i ../sv-benchmarks/c/recursive-simple/id_i20_o20-1.c ../results/automizer-verification-files/SV-COMP24_unreach-call/id_i20_o20-1.yml/witness-2.1.yml -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.positions.where.we.compute.the.hoare.annotation None --- Real Ultimate output --- This is Ultimate 0.2.4-dev-5189fb6-m [2024-09-13 06:27:17,738 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 06:27:17,810 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 06:27:17,814 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 06:27:17,816 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 06:27:17,838 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 06:27:17,839 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 06:27:17,839 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 06:27:17,839 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 06:27:17,841 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 06:27:17,841 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 06:27:17,841 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 06:27:17,842 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 06:27:17,845 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 06:27:17,845 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 06:27:17,846 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 06:27:17,846 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 06:27:17,846 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 06:27:17,846 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 06:27:17,847 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 06:27:17,847 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 06:27:17,847 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 06:27:17,847 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 06:27:17,847 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 06:27:17,848 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 06:27:17,848 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 06:27:17,848 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 06:27:17,848 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 06:27:17,849 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 06:27:17,849 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 06:27:17,849 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 06:27:17,849 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 06:27:17,849 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 06:27:17,849 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 06:27:17,850 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 06:27:17,850 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 06:27:17,850 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 06:27:17,850 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 06:27:17,850 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 06:27:17,850 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 06:27:17,850 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 06:27:17,852 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 06:27:17,852 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> None [2024-09-13 06:27:18,063 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 06:27:18,088 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 06:27:18,091 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 06:27:18,092 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 06:27:18,092 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 06:27:18,093 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive-simple/id_i20_o20-1.c [2024-09-13 06:27:19,465 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 06:27:19,641 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 06:27:19,642 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/id_i20_o20-1.c [2024-09-13 06:27:19,652 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/4c41acfb7/d04d2dbb54bf4124b61b927137b74c3b/FLAGa33c55a3e [2024-09-13 06:27:19,668 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/4c41acfb7/d04d2dbb54bf4124b61b927137b74c3b [2024-09-13 06:27:19,673 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-09-13 06:27:19,674 INFO L274 PluginConnector]: Witness Parser initialized [2024-09-13 06:27:19,674 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../results/automizer-verification-files/SV-COMP24_unreach-call/id_i20_o20-1.yml/witness-2.1.yml [2024-09-13 06:27:19,732 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 06:27:19,733 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-09-13 06:27:19,735 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 06:27:19,735 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 06:27:19,741 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 06:27:19,742 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 06:27:19" (1/2) ... [2024-09-13 06:27:19,744 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@413109e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:27:19, skipping insertion in model container [2024-09-13 06:27:19,744 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 06:27:19" (1/2) ... [2024-09-13 06:27:19,746 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@364f881f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:27:19, skipping insertion in model container [2024-09-13 06:27:19,746 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 13.09 06:27:19" (2/2) ... [2024-09-13 06:27:19,747 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@413109e9 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:27:19, skipping insertion in model container [2024-09-13 06:27:19,747 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 13.09 06:27:19" (2/2) ... [2024-09-13 06:27:19,754 INFO L93 nessWitnessExtractor]: Found the following entries in the witness: [2024-09-13 06:27:19,755 INFO L1541 ArrayList]: Function contract at [L6]: requires null, ensures (((((((((((((((((((((((3 == \result) && (\old(x) == 3)) || ((19 == \result) && (19 == \old(x)))) || ((11 == \result) && (\old(x) == 11))) || ((\old(x) == 6) && (6 == \result))) || ((9 == \result) && (\old(x) == 9))) || ((\old(x) == 17) && (17 == \result))) || ((\old(x) == 18) && (18 == \result))) || ((2 == \result) && (\old(x) == 2))) || (20 < \old(x))) || ((10 == \result) && (\old(x) == 10))) || ((5 == \result) && (5 == \old(x)))) || ((20 == \result) && (\old(x) == 20))) || ((8 == \result) && (\old(x) == 8))) || ((7 == \result) && (7 == \old(x)))) || ((12 == \result) && (\old(x) == 12))) || ((\result == 1) && (\old(x) == 1))) || ((14 == \result) && (\old(x) == 14))) || ((\old(x) == 4) && (4 == \result))) || ((\old(x) == 15) && (15 == \result))) || ((13 == \result) && (\old(x) == 13))) || ((\old(x) == 16) && (16 == \result))) || ((\result == 0) && (\old(x) == 0))) [2024-09-13 06:27:19,772 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 06:27:19,926 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/id_i20_o20-1.c[454,467] [2024-09-13 06:27:19,935 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 06:27:19,949 INFO L200 MainTranslator]: Completed pre-run Start Parsing Global [2024-09-13 06:27:19,999 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/id_i20_o20-1.c[454,467] [2024-09-13 06:27:20,000 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 06:27:20,014 INFO L204 MainTranslator]: Completed translation [2024-09-13 06:27:20,015 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:27:20 WrapperNode [2024-09-13 06:27:20,015 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 06:27:20,016 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 06:27:20,016 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 06:27:20,017 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 06:27:20,023 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:27:20" (1/1) ... [2024-09-13 06:27:20,031 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:27:20" (1/1) ... [2024-09-13 06:27:20,073 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2024-09-13 06:27:20,073 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 06:27:20,074 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 06:27:20,074 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 06:27:20,074 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 06:27:20,082 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:27:20" (1/1) ... [2024-09-13 06:27:20,082 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:27:20" (1/1) ... [2024-09-13 06:27:20,083 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:27:20" (1/1) ... [2024-09-13 06:27:20,091 WARN L109 MemorySlicer]: Omit memory slicing because it failed with the following exception: Unsupported: Procedure id is not part of the Ultimate memory model but has specification other that is not a ModifiesSpecification [2024-09-13 06:27:20,091 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:27:20" (1/1) ... [2024-09-13 06:27:20,091 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:27:20" (1/1) ... [2024-09-13 06:27:20,094 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:27:20" (1/1) ... [2024-09-13 06:27:20,099 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:27:20" (1/1) ... [2024-09-13 06:27:20,100 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:27:20" (1/1) ... [2024-09-13 06:27:20,100 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:27:20" (1/1) ... [2024-09-13 06:27:20,101 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 06:27:20,102 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 06:27:20,102 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 06:27:20,102 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 06:27:20,119 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:27:20" (1/1) ... [2024-09-13 06:27:20,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 06:27:20,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:20,143 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-13 06:27:20,145 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-13 06:27:20,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 06:27:20,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 06:27:20,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 06:27:20,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-09-13 06:27:20,184 INFO L130 BoogieDeclarations]: Found specification of procedure id [2024-09-13 06:27:20,184 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2024-09-13 06:27:20,239 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 06:27:20,241 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 06:27:20,409 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-13 06:27:20,409 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 06:27:20,433 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 06:27:20,434 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-13 06:27:20,435 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 06:27:20 BoogieIcfgContainer [2024-09-13 06:27:20,435 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 06:27:20,438 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 06:27:20,439 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 06:27:20,442 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 06:27:20,442 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 06:27:19" (1/4) ... [2024-09-13 06:27:20,444 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cc5289d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 06:27:20, skipping insertion in model container [2024-09-13 06:27:20,444 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 13.09 06:27:19" (2/4) ... [2024-09-13 06:27:20,444 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cc5289d and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 13.09 06:27:20, skipping insertion in model container [2024-09-13 06:27:20,444 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:27:20" (3/4) ... [2024-09-13 06:27:20,445 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cc5289d and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 13.09 06:27:20, skipping insertion in model container [2024-09-13 06:27:20,445 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 06:27:20" (4/4) ... [2024-09-13 06:27:20,447 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i20_o20-1.c [2024-09-13 06:27:20,460 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 06:27:20,461 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-09-13 06:27:20,497 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 06:27:20,502 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;@18bf5591, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 06:27:20,502 INFO L337 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-09-13 06:27:20,505 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 11 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-13 06:27:20,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-09-13 06:27:20,510 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:20,511 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-09-13 06:27:20,511 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:20,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:20,516 INFO L85 PathProgramCache]: Analyzing trace with hash 56172024, now seen corresponding path program 1 times [2024-09-13 06:27:20,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:20,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96255693] [2024-09-13 06:27:20,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:20,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:20,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:20,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 06:27:20,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:20,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96255693] [2024-09-13 06:27:20,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96255693] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 06:27:20,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 06:27:20,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-13 06:27:20,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755661107] [2024-09-13 06:27:20,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 06:27:20,768 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 06:27:20,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:20,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 06:27:20,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 06:27:20,795 INFO L87 Difference]: Start difference. First operand has 15 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 11 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 06:27:20,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:20,879 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2024-09-13 06:27:20,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 06:27:20,881 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-09-13 06:27:20,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:20,895 INFO L225 Difference]: With dead ends: 22 [2024-09-13 06:27:20,896 INFO L226 Difference]: Without dead ends: 20 [2024-09-13 06:27:20,897 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 06:27:20,903 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 06:27:20,904 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 34 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 06:27:20,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-09-13 06:27:20,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2024-09-13 06:27:20,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 06:27:20,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2024-09-13 06:27:20,940 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 5 [2024-09-13 06:27:20,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:20,941 INFO L474 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2024-09-13 06:27:20,941 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 06:27:20,941 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2024-09-13 06:27:20,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-09-13 06:27:20,942 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:20,942 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-09-13 06:27:20,942 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 06:27:20,943 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:20,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:20,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1615449573, now seen corresponding path program 1 times [2024-09-13 06:27:20,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:20,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594495038] [2024-09-13 06:27:20,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:20,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:20,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:21,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 06:27:21,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:21,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594495038] [2024-09-13 06:27:21,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594495038] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:21,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417331106] [2024-09-13 06:27:21,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:21,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:21,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:21,113 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 06:27:21,116 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 06:27:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:21,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-13 06:27:21,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:21,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 06:27:21,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:27:21,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 06:27:21,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417331106] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:27:21,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:27:21,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-09-13 06:27:21,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041369281] [2024-09-13 06:27:21,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:27:21,277 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-13 06:27:21,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:21,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-13 06:27:21,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-09-13 06:27:21,279 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 12 states, 10 states have (on average 1.1) internal successors, (11), 7 states have internal predecessors, (11), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 06:27:21,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:21,419 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2024-09-13 06:27:21,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-13 06:27:21,423 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.1) internal successors, (11), 7 states have internal predecessors, (11), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-09-13 06:27:21,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:21,424 INFO L225 Difference]: With dead ends: 41 [2024-09-13 06:27:21,424 INFO L226 Difference]: Without dead ends: 41 [2024-09-13 06:27:21,425 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-09-13 06:27:21,426 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 06:27:21,426 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 69 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 06:27:21,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-13 06:27:21,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2024-09-13 06:27:21,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-13 06:27:21,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2024-09-13 06:27:21,435 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 8 [2024-09-13 06:27:21,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:21,435 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2024-09-13 06:27:21,435 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.1) internal successors, (11), 7 states have internal predecessors, (11), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 06:27:21,436 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2024-09-13 06:27:21,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-13 06:27:21,437 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:21,437 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1] [2024-09-13 06:27:21,465 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-13 06:27:21,637 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:21,638 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:21,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:21,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1295816760, now seen corresponding path program 2 times [2024-09-13 06:27:21,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:21,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728371475] [2024-09-13 06:27:21,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:21,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:21,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:21,818 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 06:27:21,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:21,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728371475] [2024-09-13 06:27:21,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728371475] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:21,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556441609] [2024-09-13 06:27:21,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 06:27:21,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:21,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:21,823 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 06:27:21,825 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 06:27:21,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-09-13 06:27:21,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:27:21,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 06:27:21,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:21,897 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-13 06:27:21,897 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 06:27:21,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556441609] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 06:27:21,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 06:27:21,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 15 [2024-09-13 06:27:21,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531050609] [2024-09-13 06:27:21,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 06:27:21,898 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 06:27:21,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:21,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 06:27:21,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-09-13 06:27:21,899 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 06:27:21,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:21,926 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2024-09-13 06:27:21,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-13 06:27:21,927 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-09-13 06:27:21,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:21,929 INFO L225 Difference]: With dead ends: 39 [2024-09-13 06:27:21,929 INFO L226 Difference]: Without dead ends: 39 [2024-09-13 06:27:21,929 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-09-13 06:27:21,930 INFO L434 NwaCegarLoop]: 7 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 06:27:21,932 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 13 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 06:27:21,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-13 06:27:21,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2024-09-13 06:27:21,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.24) internal successors, (31), 26 states have internal predecessors, (31), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-13 06:27:21,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2024-09-13 06:27:21,939 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 17 [2024-09-13 06:27:21,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:21,939 INFO L474 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2024-09-13 06:27:21,939 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 06:27:21,940 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2024-09-13 06:27:21,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-13 06:27:21,940 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:21,940 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 06:27:21,953 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-13 06:27:22,140 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:22,141 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:22,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:22,141 INFO L85 PathProgramCache]: Analyzing trace with hash 511038535, now seen corresponding path program 1 times [2024-09-13 06:27:22,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:22,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404879120] [2024-09-13 06:27:22,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:22,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:22,285 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-13 06:27:22,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:22,336 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 06:27:22,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:22,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404879120] [2024-09-13 06:27:22,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404879120] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:22,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322447217] [2024-09-13 06:27:22,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:22,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:22,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:22,339 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 06:27:22,340 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-13 06:27:22,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:22,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-13 06:27:22,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:22,434 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 06:27:22,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:27:22,641 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 06:27:22,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322447217] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:27:22,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:27:22,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-09-13 06:27:22,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523632928] [2024-09-13 06:27:22,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:27:22,642 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-13 06:27:22,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:22,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-13 06:27:22,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2024-09-13 06:27:22,644 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 25 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 16 states have internal predecessors, (28), 10 states have call successors, (10), 9 states have call predecessors, (10), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 06:27:23,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:23,077 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2024-09-13 06:27:23,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-13 06:27:23,079 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 16 states have internal predecessors, (28), 10 states have call successors, (10), 9 states have call predecessors, (10), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2024-09-13 06:27:23,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:23,080 INFO L225 Difference]: With dead ends: 71 [2024-09-13 06:27:23,080 INFO L226 Difference]: Without dead ends: 71 [2024-09-13 06:27:23,080 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2024-09-13 06:27:23,081 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 125 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 06:27:23,081 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 120 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 06:27:23,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-13 06:27:23,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2024-09-13 06:27:23,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 43 states have internal predecessors, (51), 10 states have call successors, (10), 9 states have call predecessors, (10), 10 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-09-13 06:27:23,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2024-09-13 06:27:23,088 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 20 [2024-09-13 06:27:23,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:23,088 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2024-09-13 06:27:23,088 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 16 states have internal predecessors, (28), 10 states have call successors, (10), 9 states have call predecessors, (10), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 06:27:23,088 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2024-09-13 06:27:23,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-13 06:27:23,091 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:23,091 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 06:27:23,115 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-13 06:27:23,292 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:23,292 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:23,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:23,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1809419033, now seen corresponding path program 2 times [2024-09-13 06:27:23,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:23,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049624524] [2024-09-13 06:27:23,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:23,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:23,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:23,620 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-13 06:27:23,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 1 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 06:27:23,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:23,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049624524] [2024-09-13 06:27:23,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049624524] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:23,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809933648] [2024-09-13 06:27:23,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 06:27:23,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:23,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:23,683 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 06:27:23,685 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-13 06:27:23,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 06:27:23,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:27:23,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-13 06:27:23,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:23,847 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 1 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 06:27:23,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:27:24,420 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 1 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 06:27:24,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809933648] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:27:24,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:27:24,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 47 [2024-09-13 06:27:24,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941342442] [2024-09-13 06:27:24,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:27:24,421 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-13 06:27:24,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:24,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-13 06:27:24,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=459, Invalid=1703, Unknown=0, NotChecked=0, Total=2162 [2024-09-13 06:27:24,423 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 27 states have internal predecessors, (50), 21 states have call successors, (22), 20 states have call predecessors, (22), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 06:27:25,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:25,203 INFO L93 Difference]: Finished difference Result 148 states and 149 transitions. [2024-09-13 06:27:25,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-09-13 06:27:25,204 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 27 states have internal predecessors, (50), 21 states have call successors, (22), 20 states have call predecessors, (22), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2024-09-13 06:27:25,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:25,205 INFO L225 Difference]: With dead ends: 148 [2024-09-13 06:27:25,207 INFO L226 Difference]: Without dead ends: 148 [2024-09-13 06:27:25,208 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1129, Invalid=3293, Unknown=0, NotChecked=0, Total=4422 [2024-09-13 06:27:25,209 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 259 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 06:27:25,209 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 228 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 06:27:25,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-09-13 06:27:25,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 129. [2024-09-13 06:27:25,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 87 states have internal predecessors, (106), 21 states have call successors, (21), 20 states have call predecessors, (21), 21 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2024-09-13 06:27:25,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 149 transitions. [2024-09-13 06:27:25,224 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 149 transitions. Word has length 38 [2024-09-13 06:27:25,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:25,225 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 149 transitions. [2024-09-13 06:27:25,225 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 27 states have internal predecessors, (50), 21 states have call successors, (22), 20 states have call predecessors, (22), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 06:27:25,225 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 149 transitions. [2024-09-13 06:27:25,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-13 06:27:25,226 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:25,226 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 06:27:25,246 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-13 06:27:25,427 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:25,427 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:25,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:25,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1369371833, now seen corresponding path program 3 times [2024-09-13 06:27:25,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:25,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642049262] [2024-09-13 06:27:25,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:25,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:25,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:26,497 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-13 06:27:26,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:26,593 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 0 proven. 611 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 06:27:26,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:26,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642049262] [2024-09-13 06:27:26,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642049262] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:26,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375198656] [2024-09-13 06:27:26,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 06:27:26,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:26,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:26,596 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 06:27:26,599 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-13 06:27:26,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-13 06:27:26,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:27:26,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-13 06:27:26,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:26,676 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 57 proven. 1 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2024-09-13 06:27:26,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:27:26,800 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2024-09-13 06:27:26,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375198656] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:27:26,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:27:26,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 5, 6] total 47 [2024-09-13 06:27:26,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102410235] [2024-09-13 06:27:26,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:27:26,803 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-13 06:27:26,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:26,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-13 06:27:26,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2024-09-13 06:27:26,806 INFO L87 Difference]: Start difference. First operand 129 states and 149 transitions. Second operand has 48 states, 46 states have (on average 1.173913043478261) internal successors, (54), 28 states have internal predecessors, (54), 24 states have call successors, (25), 21 states have call predecessors, (25), 1 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 06:27:28,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:28,941 INFO L93 Difference]: Finished difference Result 215 states and 237 transitions. [2024-09-13 06:27:28,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-13 06:27:28,942 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 1.173913043478261) internal successors, (54), 28 states have internal predecessors, (54), 24 states have call successors, (25), 21 states have call predecessors, (25), 1 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2024-09-13 06:27:28,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:28,943 INFO L225 Difference]: With dead ends: 215 [2024-09-13 06:27:28,943 INFO L226 Difference]: Without dead ends: 215 [2024-09-13 06:27:28,944 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=294, Invalid=4536, Unknown=0, NotChecked=0, Total=4830 [2024-09-13 06:27:28,945 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 288 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 5111 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 5280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 5111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-13 06:27:28,945 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 871 Invalid, 5280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 5111 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-13 06:27:28,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-09-13 06:27:28,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 194. [2024-09-13 06:27:28,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 129 states have (on average 1.317829457364341) internal successors, (170), 130 states have internal predecessors, (170), 22 states have call successors, (22), 21 states have call predecessors, (22), 41 states have return successors, (44), 42 states have call predecessors, (44), 22 states have call successors, (44) [2024-09-13 06:27:28,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 236 transitions. [2024-09-13 06:27:28,966 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 236 transitions. Word has length 68 [2024-09-13 06:27:28,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:28,966 INFO L474 AbstractCegarLoop]: Abstraction has 194 states and 236 transitions. [2024-09-13 06:27:28,966 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 1.173913043478261) internal successors, (54), 28 states have internal predecessors, (54), 24 states have call successors, (25), 21 states have call predecessors, (25), 1 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 06:27:28,966 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 236 transitions. [2024-09-13 06:27:28,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-13 06:27:28,967 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:28,968 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 2, 2, 2, 1, 1, 1, 1] [2024-09-13 06:27:28,983 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-13 06:27:29,168 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-13 06:27:29,169 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:29,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:29,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1356901672, now seen corresponding path program 4 times [2024-09-13 06:27:29,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:29,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259230670] [2024-09-13 06:27:29,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:29,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:29,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:29,974 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-13 06:27:29,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:30,057 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:30,131 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 1 proven. 613 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 06:27:30,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:30,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259230670] [2024-09-13 06:27:30,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259230670] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:30,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118129609] [2024-09-13 06:27:30,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 06:27:30,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:30,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:30,135 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 06:27:30,136 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-13 06:27:30,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 06:27:30,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:27:30,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-13 06:27:30,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 90 proven. 5 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2024-09-13 06:27:30,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:27:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 90 proven. 9 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2024-09-13 06:27:30,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118129609] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:27:30,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:27:30,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 7, 9] total 50 [2024-09-13 06:27:30,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134127872] [2024-09-13 06:27:30,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:27:30,486 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-13 06:27:30,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:30,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-13 06:27:30,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2384, Unknown=0, NotChecked=0, Total=2550 [2024-09-13 06:27:30,488 INFO L87 Difference]: Start difference. First operand 194 states and 236 transitions. Second operand has 51 states, 49 states have (on average 1.183673469387755) internal successors, (58), 30 states have internal predecessors, (58), 24 states have call successors, (25), 20 states have call predecessors, (25), 3 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-13 06:27:32,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:32,278 INFO L93 Difference]: Finished difference Result 216 states and 238 transitions. [2024-09-13 06:27:32,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-13 06:27:32,278 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 49 states have (on average 1.183673469387755) internal successors, (58), 30 states have internal predecessors, (58), 24 states have call successors, (25), 20 states have call predecessors, (25), 3 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 71 [2024-09-13 06:27:32,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:32,280 INFO L225 Difference]: With dead ends: 216 [2024-09-13 06:27:32,280 INFO L226 Difference]: Without dead ends: 216 [2024-09-13 06:27:32,281 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=351, Invalid=5051, Unknown=0, NotChecked=0, Total=5402 [2024-09-13 06:27:32,281 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 294 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 4975 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 5124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 4975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-13 06:27:32,281 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 790 Invalid, 5124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 4975 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-13 06:27:32,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2024-09-13 06:27:32,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 197. [2024-09-13 06:27:32,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 131 states have (on average 1.3053435114503817) internal successors, (171), 132 states have internal predecessors, (171), 22 states have call successors, (22), 21 states have call predecessors, (22), 42 states have return successors, (45), 43 states have call predecessors, (45), 22 states have call successors, (45) [2024-09-13 06:27:32,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 238 transitions. [2024-09-13 06:27:32,299 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 238 transitions. Word has length 71 [2024-09-13 06:27:32,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:32,299 INFO L474 AbstractCegarLoop]: Abstraction has 197 states and 238 transitions. [2024-09-13 06:27:32,299 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 49 states have (on average 1.183673469387755) internal successors, (58), 30 states have internal predecessors, (58), 24 states have call successors, (25), 20 states have call predecessors, (25), 3 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-13 06:27:32,300 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 238 transitions. [2024-09-13 06:27:32,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-13 06:27:32,300 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:32,300 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 3, 3, 3, 1, 1, 1, 1] [2024-09-13 06:27:32,315 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 06:27:32,501 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:32,501 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:32,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:32,502 INFO L85 PathProgramCache]: Analyzing trace with hash 774477223, now seen corresponding path program 5 times [2024-09-13 06:27:32,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:32,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929995431] [2024-09-13 06:27:32,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:32,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:32,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:33,313 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 06:27:33,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:33,426 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:33,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:33,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:33,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:33,600 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 2 proven. 615 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-13 06:27:33,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:33,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929995431] [2024-09-13 06:27:33,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929995431] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:33,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573990767] [2024-09-13 06:27:33,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 06:27:33,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:33,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:33,603 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 06:27:33,604 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-13 06:27:33,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2024-09-13 06:27:33,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:27:33,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-09-13 06:27:33,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:33,835 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 615 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-13 06:27:33,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:27:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 615 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-13 06:27:33,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573990767] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:27:33,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:27:33,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 44] total 47 [2024-09-13 06:27:33,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93238159] [2024-09-13 06:27:33,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:27:33,960 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-13 06:27:33,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:33,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-13 06:27:33,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=2158, Unknown=0, NotChecked=0, Total=2256 [2024-09-13 06:27:33,962 INFO L87 Difference]: Start difference. First operand 197 states and 238 transitions. Second operand has 48 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 28 states have internal predecessors, (52), 21 states have call successors, (21), 19 states have call predecessors, (21), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-13 06:27:35,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:35,701 INFO L93 Difference]: Finished difference Result 218 states and 241 transitions. [2024-09-13 06:27:35,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-09-13 06:27:35,702 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 28 states have internal predecessors, (52), 21 states have call successors, (21), 19 states have call predecessors, (21), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 74 [2024-09-13 06:27:35,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:35,703 INFO L225 Difference]: With dead ends: 218 [2024-09-13 06:27:35,703 INFO L226 Difference]: Without dead ends: 218 [2024-09-13 06:27:35,704 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=211, Invalid=4759, Unknown=0, NotChecked=0, Total=4970 [2024-09-13 06:27:35,704 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 221 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 5162 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 5214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 5162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-13 06:27:35,704 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 786 Invalid, 5214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 5162 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-13 06:27:35,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-09-13 06:27:35,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 200. [2024-09-13 06:27:35,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 133 states have (on average 1.300751879699248) internal successors, (173), 134 states have internal predecessors, (173), 22 states have call successors, (22), 21 states have call predecessors, (22), 43 states have return successors, (46), 44 states have call predecessors, (46), 22 states have call successors, (46) [2024-09-13 06:27:35,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 241 transitions. [2024-09-13 06:27:35,714 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 241 transitions. Word has length 74 [2024-09-13 06:27:35,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:35,715 INFO L474 AbstractCegarLoop]: Abstraction has 200 states and 241 transitions. [2024-09-13 06:27:35,715 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 28 states have internal predecessors, (52), 21 states have call successors, (21), 19 states have call predecessors, (21), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-13 06:27:35,715 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 241 transitions. [2024-09-13 06:27:35,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-13 06:27:35,716 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:35,716 INFO L216 NwaCegarLoop]: trace histogram [25, 24, 24, 3, 3, 3, 1, 1, 1, 1] [2024-09-13 06:27:35,729 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 06:27:35,917 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:35,917 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:35,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:35,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1481278311, now seen corresponding path program 6 times [2024-09-13 06:27:35,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:35,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596583058] [2024-09-13 06:27:35,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:35,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:35,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:36,744 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-13 06:27:36,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:36,813 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:36,856 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:36,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:36,926 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 701 proven. 182 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-13 06:27:36,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:36,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596583058] [2024-09-13 06:27:36,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596583058] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:36,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128424866] [2024-09-13 06:27:36,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 06:27:36,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:36,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:36,929 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 06:27:36,932 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-13 06:27:36,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-09-13 06:27:36,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:27:36,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-13 06:27:36,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:37,203 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 147 proven. 12 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2024-09-13 06:27:37,203 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:27:37,419 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 147 proven. 21 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2024-09-13 06:27:37,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128424866] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:27:37,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:27:37,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 9, 12] total 63 [2024-09-13 06:27:37,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411145977] [2024-09-13 06:27:37,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:27:37,420 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-09-13 06:27:37,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:37,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-09-13 06:27:37,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=779, Invalid=3127, Unknown=0, NotChecked=0, Total=3906 [2024-09-13 06:27:37,424 INFO L87 Difference]: Start difference. First operand 200 states and 241 transitions. Second operand has 63 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 38 states have internal predecessors, (75), 28 states have call successors, (29), 23 states have call predecessors, (29), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-13 06:27:38,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:38,203 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2024-09-13 06:27:38,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2024-09-13 06:27:38,204 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 38 states have internal predecessors, (75), 28 states have call successors, (29), 23 states have call predecessors, (29), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 86 [2024-09-13 06:27:38,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:38,205 INFO L225 Difference]: With dead ends: 150 [2024-09-13 06:27:38,205 INFO L226 Difference]: Without dead ends: 147 [2024-09-13 06:27:38,207 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2738 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2931, Invalid=8625, Unknown=0, NotChecked=0, Total=11556 [2024-09-13 06:27:38,207 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 639 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 06:27:38,208 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [640 Valid, 104 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 06:27:38,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-09-13 06:27:38,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 131. [2024-09-13 06:27:38,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 87 states have (on average 1.1954022988505748) internal successors, (104), 88 states have internal predecessors, (104), 21 states have call successors, (21), 21 states have call predecessors, (21), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-13 06:27:38,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 146 transitions. [2024-09-13 06:27:38,212 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 146 transitions. Word has length 86 [2024-09-13 06:27:38,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:38,212 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 146 transitions. [2024-09-13 06:27:38,212 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 38 states have internal predecessors, (75), 28 states have call successors, (29), 23 states have call predecessors, (29), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-13 06:27:38,212 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 146 transitions. [2024-09-13 06:27:38,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-09-13 06:27:38,213 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:38,214 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 1, 1, 1, 1] [2024-09-13 06:27:38,228 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 06:27:38,414 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:38,415 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:38,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:38,415 INFO L85 PathProgramCache]: Analyzing trace with hash -113365896, now seen corresponding path program 7 times [2024-09-13 06:27:38,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:38,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38264404] [2024-09-13 06:27:38,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:38,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:38,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:39,078 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-13 06:27:39,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:39,167 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:39,243 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:39,308 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:39,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:39,378 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 3 proven. 617 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 06:27:39,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:39,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38264404] [2024-09-13 06:27:39,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38264404] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:39,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604401960] [2024-09-13 06:27:39,379 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 06:27:39,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:39,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:39,380 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 06:27:39,382 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-13 06:27:39,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:39,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-09-13 06:27:39,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:39,525 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 617 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 06:27:39,525 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:27:39,633 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 617 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 06:27:39,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604401960] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:27:39,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:27:39,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 46 [2024-09-13 06:27:39,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298311598] [2024-09-13 06:27:39,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:27:39,634 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-13 06:27:39,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:39,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-13 06:27:39,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=2068, Unknown=0, NotChecked=0, Total=2162 [2024-09-13 06:27:39,635 INFO L87 Difference]: Start difference. First operand 131 states and 146 transitions. Second operand has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 27 states have internal predecessors, (50), 19 states have call successors, (19), 18 states have call predecessors, (19), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-13 06:27:41,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:41,098 INFO L93 Difference]: Finished difference Result 146 states and 145 transitions. [2024-09-13 06:27:41,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-09-13 06:27:41,099 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 27 states have internal predecessors, (50), 19 states have call successors, (19), 18 states have call predecessors, (19), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 77 [2024-09-13 06:27:41,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:41,099 INFO L225 Difference]: With dead ends: 146 [2024-09-13 06:27:41,099 INFO L226 Difference]: Without dead ends: 146 [2024-09-13 06:27:41,100 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=214, Invalid=4898, Unknown=0, NotChecked=0, Total=5112 [2024-09-13 06:27:41,101 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 207 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 4904 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 4953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 4904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-13 06:27:41,101 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 699 Invalid, 4953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 4904 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-13 06:27:41,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-09-13 06:27:41,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 131. [2024-09-13 06:27:41,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 88 states have internal predecessors, (103), 21 states have call successors, (21), 21 states have call predecessors, (21), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-13 06:27:41,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2024-09-13 06:27:41,104 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 77 [2024-09-13 06:27:41,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:41,104 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2024-09-13 06:27:41,105 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 27 states have internal predecessors, (50), 19 states have call successors, (19), 18 states have call predecessors, (19), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-13 06:27:41,105 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2024-09-13 06:27:41,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-13 06:27:41,106 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:41,106 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 1, 1, 1, 1] [2024-09-13 06:27:41,118 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 06:27:41,309 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-13 06:27:41,310 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:41,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:41,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1439115257, now seen corresponding path program 8 times [2024-09-13 06:27:41,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:41,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367818795] [2024-09-13 06:27:41,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:41,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:41,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:41,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-13 06:27:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:41,973 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:41,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:42,046 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:42,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:42,114 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:42,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:42,180 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:42,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:42,246 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 4 proven. 619 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-13 06:27:42,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:42,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367818795] [2024-09-13 06:27:42,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367818795] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:42,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13450007] [2024-09-13 06:27:42,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 06:27:42,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:42,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:42,249 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 06:27:42,250 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-13 06:27:42,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 06:27:42,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:27:42,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-09-13 06:27:42,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:42,400 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 619 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-13 06:27:42,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:27:42,526 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 619 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-13 06:27:42,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13450007] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:27:42,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:27:42,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 46 [2024-09-13 06:27:42,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531913659] [2024-09-13 06:27:42,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:27:42,527 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-13 06:27:42,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:42,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-13 06:27:42,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=2068, Unknown=0, NotChecked=0, Total=2162 [2024-09-13 06:27:42,528 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 27 states have internal predecessors, (50), 18 states have call successors, (18), 17 states have call predecessors, (18), 6 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-13 06:27:44,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:44,024 INFO L93 Difference]: Finished difference Result 145 states and 144 transitions. [2024-09-13 06:27:44,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-09-13 06:27:44,025 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 27 states have internal predecessors, (50), 18 states have call successors, (18), 17 states have call predecessors, (18), 6 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) Word has length 80 [2024-09-13 06:27:44,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:44,025 INFO L225 Difference]: With dead ends: 145 [2024-09-13 06:27:44,025 INFO L226 Difference]: Without dead ends: 145 [2024-09-13 06:27:44,027 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=217, Invalid=5039, Unknown=0, NotChecked=0, Total=5256 [2024-09-13 06:27:44,027 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 196 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 5052 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 5098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 5052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-13 06:27:44,027 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 642 Invalid, 5098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 5052 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-13 06:27:44,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-09-13 06:27:44,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 131. [2024-09-13 06:27:44,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 87 states have (on average 1.1724137931034482) internal successors, (102), 88 states have internal predecessors, (102), 21 states have call successors, (21), 21 states have call predecessors, (21), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-13 06:27:44,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2024-09-13 06:27:44,030 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 80 [2024-09-13 06:27:44,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:44,030 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2024-09-13 06:27:44,030 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 27 states have internal predecessors, (50), 18 states have call successors, (18), 17 states have call predecessors, (18), 6 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-13 06:27:44,031 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2024-09-13 06:27:44,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-09-13 06:27:44,031 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:44,031 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 1, 1, 1, 1] [2024-09-13 06:27:44,043 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-13 06:27:44,232 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-13 06:27:44,232 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:44,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:44,232 INFO L85 PathProgramCache]: Analyzing trace with hash -319074792, now seen corresponding path program 9 times [2024-09-13 06:27:44,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:44,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350345037] [2024-09-13 06:27:44,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:44,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:44,835 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-13 06:27:44,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:44,936 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:44,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:45,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:45,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:45,099 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:45,168 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:45,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:45,234 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:45,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:45,293 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 5 proven. 621 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-13 06:27:45,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:45,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350345037] [2024-09-13 06:27:45,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350345037] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:45,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75687452] [2024-09-13 06:27:45,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 06:27:45,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:45,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:45,295 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 06:27:45,295 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-13 06:27:45,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-13 06:27:45,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:27:45,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-13 06:27:45,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 182 proven. 51 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked. [2024-09-13 06:27:45,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:27:46,302 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 182 proven. 87 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-09-13 06:27:46,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75687452] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:27:46,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:27:46,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 15, 21] total 62 [2024-09-13 06:27:46,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761447811] [2024-09-13 06:27:46,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:27:46,304 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-09-13 06:27:46,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:46,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-09-13 06:27:46,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=3652, Unknown=0, NotChecked=0, Total=3906 [2024-09-13 06:27:46,305 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand has 63 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 38 states have internal predecessors, (74), 24 states have call successors, (25), 16 states have call predecessors, (25), 11 states have return successors, (18), 11 states have call predecessors, (18), 9 states have call successors, (18) [2024-09-13 06:27:47,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:47,789 INFO L93 Difference]: Finished difference Result 144 states and 143 transitions. [2024-09-13 06:27:47,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-13 06:27:47,789 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 38 states have internal predecessors, (74), 24 states have call successors, (25), 16 states have call predecessors, (25), 11 states have return successors, (18), 11 states have call predecessors, (18), 9 states have call successors, (18) Word has length 83 [2024-09-13 06:27:47,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:47,790 INFO L225 Difference]: With dead ends: 144 [2024-09-13 06:27:47,790 INFO L226 Difference]: Without dead ends: 144 [2024-09-13 06:27:47,791 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=579, Invalid=7431, Unknown=0, NotChecked=0, Total=8010 [2024-09-13 06:27:47,792 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 394 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 5028 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 5155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 5028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-13 06:27:47,792 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 542 Invalid, 5155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 5028 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-13 06:27:47,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-09-13 06:27:47,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 131. [2024-09-13 06:27:47,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 87 states have (on average 1.160919540229885) internal successors, (101), 88 states have internal predecessors, (101), 21 states have call successors, (21), 21 states have call predecessors, (21), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-13 06:27:47,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 143 transitions. [2024-09-13 06:27:47,795 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 143 transitions. Word has length 83 [2024-09-13 06:27:47,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:47,795 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 143 transitions. [2024-09-13 06:27:47,795 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 38 states have internal predecessors, (74), 24 states have call successors, (25), 16 states have call predecessors, (25), 11 states have return successors, (18), 11 states have call predecessors, (18), 9 states have call successors, (18) [2024-09-13 06:27:47,795 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 143 transitions. [2024-09-13 06:27:47,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-13 06:27:47,796 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:47,796 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 7, 7, 7, 1, 1, 1, 1] [2024-09-13 06:27:47,809 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-13 06:27:47,999 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:47,999 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:48,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:48,000 INFO L85 PathProgramCache]: Analyzing trace with hash -794504601, now seen corresponding path program 10 times [2024-09-13 06:27:48,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:48,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603072962] [2024-09-13 06:27:48,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:48,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:48,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:48,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-13 06:27:48,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:48,630 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:48,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:48,724 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:48,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:48,810 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:48,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:48,887 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:48,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:48,952 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:48,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:49,003 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:49,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:49,060 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 6 proven. 623 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-13 06:27:49,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:49,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603072962] [2024-09-13 06:27:49,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603072962] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:49,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302493801] [2024-09-13 06:27:49,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 06:27:49,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:49,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:49,061 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 06:27:49,062 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-13 06:27:49,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 06:27:49,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:27:49,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-09-13 06:27:49,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 195 proven. 70 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2024-09-13 06:27:49,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:27:50,192 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 195 proven. 119 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2024-09-13 06:27:50,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302493801] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:27:50,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:27:50,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 17, 24] total 65 [2024-09-13 06:27:50,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559018816] [2024-09-13 06:27:50,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:27:50,193 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-09-13 06:27:50,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:50,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-09-13 06:27:50,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=4019, Unknown=0, NotChecked=0, Total=4290 [2024-09-13 06:27:50,194 INFO L87 Difference]: Start difference. First operand 131 states and 143 transitions. Second operand has 66 states, 64 states have (on average 1.21875) internal successors, (78), 40 states have internal predecessors, (78), 24 states have call successors, (25), 15 states have call predecessors, (25), 13 states have return successors, (21), 13 states have call predecessors, (21), 10 states have call successors, (21) [2024-09-13 06:27:51,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:51,783 INFO L93 Difference]: Finished difference Result 143 states and 142 transitions. [2024-09-13 06:27:51,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-13 06:27:51,784 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 64 states have (on average 1.21875) internal successors, (78), 40 states have internal predecessors, (78), 24 states have call successors, (25), 15 states have call predecessors, (25), 13 states have return successors, (21), 13 states have call predecessors, (21), 10 states have call successors, (21) Word has length 86 [2024-09-13 06:27:51,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:51,785 INFO L225 Difference]: With dead ends: 143 [2024-09-13 06:27:51,785 INFO L226 Difference]: Without dead ends: 143 [2024-09-13 06:27:51,786 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=636, Invalid=8106, Unknown=0, NotChecked=0, Total=8742 [2024-09-13 06:27:51,786 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 403 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 5324 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 5458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 5324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-13 06:27:51,786 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 507 Invalid, 5458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 5324 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-13 06:27:51,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-09-13 06:27:51,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 131. [2024-09-13 06:27:51,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 88 states have internal predecessors, (100), 21 states have call successors, (21), 21 states have call predecessors, (21), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-13 06:27:51,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 142 transitions. [2024-09-13 06:27:51,789 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 142 transitions. Word has length 86 [2024-09-13 06:27:51,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:51,789 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 142 transitions. [2024-09-13 06:27:51,790 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 64 states have (on average 1.21875) internal successors, (78), 40 states have internal predecessors, (78), 24 states have call successors, (25), 15 states have call predecessors, (25), 13 states have return successors, (21), 13 states have call predecessors, (21), 10 states have call successors, (21) [2024-09-13 06:27:51,790 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 142 transitions. [2024-09-13 06:27:51,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-09-13 06:27:51,790 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:51,790 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 8, 8, 8, 1, 1, 1, 1] [2024-09-13 06:27:51,803 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 06:27:51,990 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-13 06:27:51,991 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:51,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:51,991 INFO L85 PathProgramCache]: Analyzing trace with hash 478197688, now seen corresponding path program 11 times [2024-09-13 06:27:51,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:51,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186331504] [2024-09-13 06:27:51,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:51,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:52,521 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-13 06:27:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:52,644 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:52,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:52,766 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:52,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:52,866 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:52,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:52,955 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:52,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:53,030 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:53,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:53,097 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:53,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:53,150 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:53,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:53,210 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 7 proven. 625 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-09-13 06:27:53,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:53,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186331504] [2024-09-13 06:27:53,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186331504] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:53,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840322627] [2024-09-13 06:27:53,210 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 06:27:53,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:53,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:53,211 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 06:27:53,212 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-13 06:27:53,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2024-09-13 06:27:53,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:27:53,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-09-13 06:27:53,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:53,357 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-09-13 06:27:53,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:27:53,547 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-09-13 06:27:53,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840322627] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:27:53,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:27:53,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 46 [2024-09-13 06:27:53,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691960021] [2024-09-13 06:27:53,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:27:53,548 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-13 06:27:53,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:53,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-13 06:27:53,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=2068, Unknown=0, NotChecked=0, Total=2162 [2024-09-13 06:27:53,549 INFO L87 Difference]: Start difference. First operand 131 states and 142 transitions. Second operand has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 27 states have internal predecessors, (50), 15 states have call successors, (15), 14 states have call predecessors, (15), 9 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-13 06:27:54,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:54,937 INFO L93 Difference]: Finished difference Result 142 states and 141 transitions. [2024-09-13 06:27:54,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-09-13 06:27:54,938 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 27 states have internal predecessors, (50), 15 states have call successors, (15), 14 states have call predecessors, (15), 9 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) Word has length 89 [2024-09-13 06:27:54,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:54,939 INFO L225 Difference]: With dead ends: 142 [2024-09-13 06:27:54,939 INFO L226 Difference]: Without dead ends: 142 [2024-09-13 06:27:54,939 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=226, Invalid=5474, Unknown=0, NotChecked=0, Total=5700 [2024-09-13 06:27:54,939 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 166 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 4480 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 4517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 4480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-13 06:27:54,940 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 471 Invalid, 4517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 4480 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-13 06:27:54,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-09-13 06:27:54,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 131. [2024-09-13 06:27:54,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 87 states have (on average 1.1379310344827587) internal successors, (99), 88 states have internal predecessors, (99), 21 states have call successors, (21), 21 states have call predecessors, (21), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-13 06:27:54,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 141 transitions. [2024-09-13 06:27:54,943 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 141 transitions. Word has length 89 [2024-09-13 06:27:54,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:54,943 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 141 transitions. [2024-09-13 06:27:54,943 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 27 states have internal predecessors, (50), 15 states have call successors, (15), 14 states have call predecessors, (15), 9 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-13 06:27:54,943 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 141 transitions. [2024-09-13 06:27:54,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-09-13 06:27:54,944 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:54,944 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 9, 9, 9, 1, 1, 1, 1] [2024-09-13 06:27:54,956 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-13 06:27:55,144 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-13 06:27:55,144 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:55,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:55,145 INFO L85 PathProgramCache]: Analyzing trace with hash -419199801, now seen corresponding path program 12 times [2024-09-13 06:27:55,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:55,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602717092] [2024-09-13 06:27:55,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:55,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:55,656 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-13 06:27:55,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:55,785 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:55,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:55,924 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:55,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:56,038 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:56,122 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:56,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:56,202 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:56,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:56,277 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:56,346 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:56,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:56,413 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:56,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:56,471 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 8 proven. 627 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-09-13 06:27:56,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:56,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602717092] [2024-09-13 06:27:56,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602717092] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:56,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167829242] [2024-09-13 06:27:56,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 06:27:56,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:56,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:56,473 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 06:27:56,473 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-13 06:27:56,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2024-09-13 06:27:56,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:27:56,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-13 06:27:56,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:57,232 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 47 proven. 17 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2024-09-13 06:27:57,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:27:57,808 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 21 [2024-09-13 06:28:27,811 WARN L176 XnfTransformerHelper]: Simplifying conjunction of 2097152 disjunctions. This might take some time... Killed by 15