./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/insertion_sort-2-2.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ca4ee3dd 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/AutomizerReach.xml -i ../sv-benchmarks/c/loops/insertion_sort-2-2.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f08b02f494e898be2e8c5098de245f701022f3f8b39ac6682b3bca3a03512826 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-ca4ee3d-m [2024-09-20 18:40:31,112 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 18:40:31,148 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 18:40:31,151 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 18:40:31,151 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 18:40:31,166 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 18:40:31,166 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 18:40:31,167 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 18:40:31,167 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 18:40:31,167 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 18:40:31,168 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 18:40:31,168 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 18:40:31,168 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 18:40:31,169 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 18:40:31,169 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 18:40:31,169 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 18:40:31,170 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 18:40:31,170 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 18:40:31,170 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 18:40:31,171 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 18:40:31,171 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 18:40:31,174 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 18:40:31,174 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 18:40:31,174 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 18:40:31,174 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 18:40:31,175 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 18:40:31,175 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 18:40:31,175 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 18:40:31,175 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 18:40:31,176 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 18:40:31,176 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 18:40:31,176 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 18:40:31,176 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 18:40:31,177 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 18:40:31,177 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 18:40:31,177 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 18:40:31,177 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 18:40:31,177 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 18:40:31,178 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 18:40:31,178 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 18:40:31,178 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 18:40:31,182 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 18:40:31,182 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f08b02f494e898be2e8c5098de245f701022f3f8b39ac6682b3bca3a03512826 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 18:40:31,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 18:40:31,356 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 18:40:31,358 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 18:40:31,359 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 18:40:31,359 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 18:40:31,360 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops/insertion_sort-2-2.c [2024-09-20 18:40:32,826 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 18:40:33,000 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 18:40:33,000 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops/insertion_sort-2-2.c [2024-09-20 18:40:33,007 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/c736f15d0/5f28aaaac4164ce39d20f9cac2a7c067/FLAG3f96fb62d [2024-09-20 18:40:33,406 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/c736f15d0/5f28aaaac4164ce39d20f9cac2a7c067 [2024-09-20 18:40:33,408 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 18:40:33,410 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 18:40:33,411 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 18:40:33,412 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 18:40:33,421 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 18:40:33,423 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 06:40:33" (1/1) ... [2024-09-20 18:40:33,423 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d5e3c2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:33, skipping insertion in model container [2024-09-20 18:40:33,425 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 06:40:33" (1/1) ... [2024-09-20 18:40:33,441 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 18:40:33,554 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops/insertion_sort-2-2.c[330,343] [2024-09-20 18:40:33,573 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 18:40:33,579 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 18:40:33,589 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops/insertion_sort-2-2.c[330,343] [2024-09-20 18:40:33,597 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 18:40:33,611 INFO L204 MainTranslator]: Completed translation [2024-09-20 18:40:33,612 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:33 WrapperNode [2024-09-20 18:40:33,612 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 18:40:33,613 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 18:40:33,616 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 18:40:33,616 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 18:40:33,621 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:33" (1/1) ... [2024-09-20 18:40:33,626 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:33" (1/1) ... [2024-09-20 18:40:33,630 INFO L138 Inliner]: procedures = 15, calls = 19, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 18:40:33,630 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 18:40:33,631 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 18:40:33,631 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 18:40:33,631 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 18:40:33,639 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:33" (1/1) ... [2024-09-20 18:40:33,639 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:33" (1/1) ... [2024-09-20 18:40:33,641 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:33" (1/1) ... [2024-09-20 18:40:33,651 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-09-20 18:40:33,651 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:33" (1/1) ... [2024-09-20 18:40:33,651 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:33" (1/1) ... [2024-09-20 18:40:33,656 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:33" (1/1) ... [2024-09-20 18:40:33,662 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:33" (1/1) ... [2024-09-20 18:40:33,663 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:33" (1/1) ... [2024-09-20 18:40:33,663 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:33" (1/1) ... [2024-09-20 18:40:33,665 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 18:40:33,665 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 18:40:33,665 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 18:40:33,666 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 18:40:33,666 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:33" (1/1) ... [2024-09-20 18:40:33,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 18:40:33,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:40:33,705 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-20 18:40:33,710 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-20 18:40:33,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 18:40:33,779 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 18:40:33,779 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 18:40:33,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 18:40:33,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-20 18:40:33,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-20 18:40:33,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-20 18:40:33,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-20 18:40:33,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 18:40:33,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 18:40:33,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 18:40:33,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 18:40:33,781 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-20 18:40:33,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-20 18:40:33,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 18:40:33,782 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 18:40:33,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-20 18:40:33,860 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 18:40:33,862 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 18:40:34,014 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-09-20 18:40:34,015 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 18:40:34,036 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 18:40:34,036 INFO L318 CfgBuilder]: Removed 4 assume(true) statements. [2024-09-20 18:40:34,037 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 06:40:34 BoogieIcfgContainer [2024-09-20 18:40:34,037 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 18:40:34,039 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 18:40:34,039 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 18:40:34,041 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 18:40:34,041 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 06:40:33" (1/3) ... [2024-09-20 18:40:34,042 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d7c21af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 06:40:34, skipping insertion in model container [2024-09-20 18:40:34,042 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:33" (2/3) ... [2024-09-20 18:40:34,042 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d7c21af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 06:40:34, skipping insertion in model container [2024-09-20 18:40:34,042 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 06:40:34" (3/3) ... [2024-09-20 18:40:34,043 INFO L112 eAbstractionObserver]: Analyzing ICFG insertion_sort-2-2.c [2024-09-20 18:40:34,055 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 18:40:34,056 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 18:40:34,094 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 18:40:34,099 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=All, 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;@763e75e0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 18:40:34,099 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 18:40:34,104 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 18:40:34,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-20 18:40:34,109 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:40:34,110 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:40:34,110 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:40:34,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:34,114 INFO L85 PathProgramCache]: Analyzing trace with hash 921479043, now seen corresponding path program 1 times [2024-09-20 18:40:34,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:40:34,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327159] [2024-09-20 18:40:34,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:40:34,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:40:34,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:34,333 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:40:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:34,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:40:34,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:40:34,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327159] [2024-09-20 18:40:34,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327159] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:40:34,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:40:34,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 18:40:34,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172388395] [2024-09-20 18:40:34,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:40:34,376 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 18:40:34,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:40:34,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 18:40:34,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 18:40:34,418 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:40:34,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:40:34,471 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2024-09-20 18:40:34,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 18:40:34,478 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-09-20 18:40:34,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:40:34,485 INFO L225 Difference]: With dead ends: 49 [2024-09-20 18:40:34,486 INFO L226 Difference]: Without dead ends: 23 [2024-09-20 18:40:34,488 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 18:40:34,498 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:40:34,499 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:40:34,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-09-20 18:40:34,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-09-20 18:40:34,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 18:40:34,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2024-09-20 18:40:34,579 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 15 [2024-09-20 18:40:34,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:40:34,580 INFO L474 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2024-09-20 18:40:34,580 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:40:34,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:34,581 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2024-09-20 18:40:34,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-20 18:40:34,581 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:40:34,581 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:40:34,582 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 18:40:34,582 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:40:34,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:34,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1576012003, now seen corresponding path program 1 times [2024-09-20 18:40:34,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:40:34,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839405768] [2024-09-20 18:40:34,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:40:34,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:40:34,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:34,797 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:40:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:34,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:40:34,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:40:34,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839405768] [2024-09-20 18:40:34,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839405768] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:40:34,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:40:34,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 18:40:34,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868189613] [2024-09-20 18:40:34,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:40:34,811 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 18:40:34,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:40:34,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 18:40:34,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-20 18:40:34,812 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:40:34,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:40:34,863 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2024-09-20 18:40:34,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 18:40:34,865 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-09-20 18:40:34,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:40:34,866 INFO L225 Difference]: With dead ends: 43 [2024-09-20 18:40:34,866 INFO L226 Difference]: Without dead ends: 24 [2024-09-20 18:40:34,867 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-20 18:40:34,868 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:40:34,869 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:40:34,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-20 18:40:34,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-09-20 18:40:34,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 18:40:34,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2024-09-20 18:40:34,876 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 15 [2024-09-20 18:40:34,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:40:34,876 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2024-09-20 18:40:34,876 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:40:34,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:34,877 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2024-09-20 18:40:34,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-20 18:40:34,879 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:40:34,879 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:40:34,879 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 18:40:34,879 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:40:34,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:34,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1045249472, now seen corresponding path program 1 times [2024-09-20 18:40:34,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:40:34,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471865750] [2024-09-20 18:40:34,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:40:34,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:40:34,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:35,056 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:40:35,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:35,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:40:35,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:40:35,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471865750] [2024-09-20 18:40:35,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471865750] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:40:35,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850917819] [2024-09-20 18:40:35,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:40:35,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:40:35,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:40:35,066 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:40:35,067 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 18:40:35,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:35,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-20 18:40:35,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:40:35,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 18:40:35,210 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 18:40:35,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850917819] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:40:35,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 18:40:35,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 6 [2024-09-20 18:40:35,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070381272] [2024-09-20 18:40:35,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:40:35,211 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 18:40:35,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:40:35,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 18:40:35,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-20 18:40:35,214 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:40:35,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:40:35,239 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2024-09-20 18:40:35,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 18:40:35,240 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-20 18:40:35,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:40:35,241 INFO L225 Difference]: With dead ends: 40 [2024-09-20 18:40:35,241 INFO L226 Difference]: Without dead ends: 29 [2024-09-20 18:40:35,241 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-20 18:40:35,242 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:40:35,242 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 59 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:40:35,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-20 18:40:35,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2024-09-20 18:40:35,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 18:40:35,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-09-20 18:40:35,246 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 16 [2024-09-20 18:40:35,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:40:35,246 INFO L474 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-09-20 18:40:35,247 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:40:35,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:35,247 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-09-20 18:40:35,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-20 18:40:35,247 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:40:35,248 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:40:35,261 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-20 18:40:35,451 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:40:35,452 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:40:35,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:35,453 INFO L85 PathProgramCache]: Analyzing trace with hash 530421245, now seen corresponding path program 1 times [2024-09-20 18:40:35,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:40:35,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165891253] [2024-09-20 18:40:35,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:40:35,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:40:35,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:35,605 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:40:35,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:35,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:40:35,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:40:35,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165891253] [2024-09-20 18:40:35,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165891253] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:40:35,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592796186] [2024-09-20 18:40:35,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:40:35,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:40:35,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:40:35,612 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:40:35,613 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 18:40:35,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:35,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-20 18:40:35,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:40:35,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:40:35,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:40:35,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:40:35,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592796186] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:40:35,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:40:35,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2024-09-20 18:40:35,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170135763] [2024-09-20 18:40:35,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:40:35,836 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-20 18:40:35,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:40:35,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-20 18:40:35,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-09-20 18:40:35,836 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:40:35,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:40:35,893 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2024-09-20 18:40:35,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 18:40:35,894 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2024-09-20 18:40:35,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:40:35,895 INFO L225 Difference]: With dead ends: 47 [2024-09-20 18:40:35,895 INFO L226 Difference]: Without dead ends: 30 [2024-09-20 18:40:35,896 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-09-20 18:40:35,896 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:40:35,897 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 133 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:40:35,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-20 18:40:35,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2024-09-20 18:40:35,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 18:40:35,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-09-20 18:40:35,904 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 21 [2024-09-20 18:40:35,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:40:35,904 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-09-20 18:40:35,905 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:40:35,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:35,905 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-09-20 18:40:35,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-20 18:40:35,906 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:40:35,906 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:40:35,923 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-20 18:40:36,107 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:40:36,108 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:40:36,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:36,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1034611302, now seen corresponding path program 2 times [2024-09-20 18:40:36,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:40:36,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35773289] [2024-09-20 18:40:36,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:40:36,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:40:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:36,546 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:40:36,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:40:36,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:40:36,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35773289] [2024-09-20 18:40:36,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35773289] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:40:36,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525894653] [2024-09-20 18:40:36,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:40:36,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:40:36,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:40:36,551 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:40:36,552 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 18:40:36,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:40:36,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:40:36,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-20 18:40:36,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:40:36,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-09-20 18:40:36,702 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 18:40:36,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-09-20 18:40:36,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 18:40:36,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:40:36,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2024-09-20 18:40:36,980 INFO L349 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2024-09-20 18:40:36,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 66 [2024-09-20 18:40:37,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 18:40:37,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525894653] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:40:37,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:40:37,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 23 [2024-09-20 18:40:37,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143080287] [2024-09-20 18:40:37,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:40:37,055 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 18:40:37,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:40:37,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 18:40:37,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2024-09-20 18:40:37,058 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 23 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:40:37,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:40:37,561 INFO L93 Difference]: Finished difference Result 76 states and 98 transitions. [2024-09-20 18:40:37,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-20 18:40:37,562 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-09-20 18:40:37,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:40:37,564 INFO L225 Difference]: With dead ends: 76 [2024-09-20 18:40:37,564 INFO L226 Difference]: Without dead ends: 61 [2024-09-20 18:40:37,566 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=288, Invalid=1352, Unknown=0, NotChecked=0, Total=1640 [2024-09-20 18:40:37,566 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 75 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:40:37,567 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 169 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:40:37,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-09-20 18:40:37,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 44. [2024-09-20 18:40:37,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 37 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 18:40:37,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2024-09-20 18:40:37,582 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 22 [2024-09-20 18:40:37,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:40:37,583 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2024-09-20 18:40:37,583 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:40:37,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:37,583 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2024-09-20 18:40:37,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-20 18:40:37,584 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:40:37,584 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:40:37,597 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-20 18:40:37,784 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:40:37,785 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:40:37,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:37,786 INFO L85 PathProgramCache]: Analyzing trace with hash -78593507, now seen corresponding path program 1 times [2024-09-20 18:40:37,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:40:37,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532118305] [2024-09-20 18:40:37,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:40:37,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:40:37,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:38,204 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:40:38,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:38,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:40:38,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:40:38,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532118305] [2024-09-20 18:40:38,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532118305] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:40:38,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316795384] [2024-09-20 18:40:38,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:40:38,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:40:38,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:40:38,212 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:40:38,216 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 18:40:38,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:38,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-20 18:40:38,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:40:38,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2024-09-20 18:40:38,501 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 18:40:38,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2024-09-20 18:40:38,559 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 18:40:38,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 12 [2024-09-20 18:40:38,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 18:40:38,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:40:38,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 56 [2024-09-20 18:40:38,986 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2024-09-20 18:40:38,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 334 treesize of output 282 [2024-09-20 18:40:39,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 18:40:39,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316795384] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:40:39,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:40:39,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12] total 32 [2024-09-20 18:40:39,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647138139] [2024-09-20 18:40:39,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:40:39,040 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-20 18:40:39,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:40:39,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-20 18:40:39,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2024-09-20 18:40:39,041 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 32 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:40:40,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:40:40,068 INFO L93 Difference]: Finished difference Result 107 states and 139 transitions. [2024-09-20 18:40:40,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-20 18:40:40,069 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2024-09-20 18:40:40,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:40:40,071 INFO L225 Difference]: With dead ends: 107 [2024-09-20 18:40:40,071 INFO L226 Difference]: Without dead ends: 76 [2024-09-20 18:40:40,072 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=375, Invalid=2487, Unknown=0, NotChecked=0, Total=2862 [2024-09-20 18:40:40,073 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 74 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 18:40:40,073 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 253 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 18:40:40,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-20 18:40:40,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 38. [2024-09-20 18:40:40,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 18:40:40,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2024-09-20 18:40:40,080 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 25 [2024-09-20 18:40:40,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:40:40,081 INFO L474 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2024-09-20 18:40:40,081 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:40:40,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:40,081 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2024-09-20 18:40:40,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-20 18:40:40,082 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:40:40,082 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:40:40,094 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 18:40:40,285 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:40:40,286 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:40:40,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:40,286 INFO L85 PathProgramCache]: Analyzing trace with hash -80162640, now seen corresponding path program 1 times [2024-09-20 18:40:40,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:40:40,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748805102] [2024-09-20 18:40:40,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:40:40,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:40:40,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:40,380 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:40:40,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:40,382 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-20 18:40:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:40,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 18:40:40,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:40:40,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748805102] [2024-09-20 18:40:40,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748805102] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:40:40,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920284699] [2024-09-20 18:40:40,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:40:40,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:40:40,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:40:40,387 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:40:40,388 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 18:40:40,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:40,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-20 18:40:40,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:40:40,487 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 18:40:40,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:40:40,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 18:40:40,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920284699] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:40:40,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:40:40,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2024-09-20 18:40:40,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054874712] [2024-09-20 18:40:40,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:40:40,588 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-20 18:40:40,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:40:40,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-20 18:40:40,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-09-20 18:40:40,589 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 18:40:40,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:40:40,692 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2024-09-20 18:40:40,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-20 18:40:40,692 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2024-09-20 18:40:40,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:40:40,692 INFO L225 Difference]: With dead ends: 81 [2024-09-20 18:40:40,693 INFO L226 Difference]: Without dead ends: 45 [2024-09-20 18:40:40,693 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-09-20 18:40:40,693 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 44 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:40:40,693 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 207 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:40:40,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-20 18:40:40,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2024-09-20 18:40:40,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 34 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 18:40:40,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2024-09-20 18:40:40,700 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 29 [2024-09-20 18:40:40,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:40:40,700 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2024-09-20 18:40:40,701 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 18:40:40,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:40,701 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2024-09-20 18:40:40,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-20 18:40:40,701 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:40:40,702 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:40:40,714 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 18:40:40,905 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-20 18:40:40,906 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:40:40,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:40,906 INFO L85 PathProgramCache]: Analyzing trace with hash 485904074, now seen corresponding path program 2 times [2024-09-20 18:40:40,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:40:40,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020181159] [2024-09-20 18:40:40,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:40:40,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:40:40,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:41,446 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:40:41,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:41,448 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-20 18:40:41,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:41,451 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:40:41,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:40:41,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020181159] [2024-09-20 18:40:41,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020181159] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:40:41,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144442354] [2024-09-20 18:40:41,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:40:41,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:40:41,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:40:41,453 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:40:41,455 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 18:40:41,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:40:41,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:40:41,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-20 18:40:41,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:40:41,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-09-20 18:40:41,776 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 18:40:41,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-09-20 18:40:41,807 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 18:40:41,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:40:49,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2024-09-20 18:40:49,966 INFO L349 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2024-09-20 18:40:49,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 58 [2024-09-20 18:40:49,988 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 18:40:49,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144442354] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:40:49,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:40:49,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 13] total 31 [2024-09-20 18:40:49,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027807891] [2024-09-20 18:40:49,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:40:49,989 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-20 18:40:49,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:40:49,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-20 18:40:49,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=823, Unknown=2, NotChecked=0, Total=930 [2024-09-20 18:40:49,990 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 31 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 18:40:54,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:40:58,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:41:02,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:41:06,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:41:10,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:41:14,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:41:18,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:41:22,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:41:26,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:41:30,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:41:34,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:41:38,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:41:42,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:41:46,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:41:50,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:41:50,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:41:50,738 INFO L93 Difference]: Finished difference Result 89 states and 105 transitions. [2024-09-20 18:41:50,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-20 18:41:50,738 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 35 [2024-09-20 18:41:50,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:41:50,739 INFO L225 Difference]: With dead ends: 89 [2024-09-20 18:41:50,739 INFO L226 Difference]: Without dead ends: 87 [2024-09-20 18:41:50,740 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=222, Invalid=1668, Unknown=2, NotChecked=0, Total=1892 [2024-09-20 18:41:50,740 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 83 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 21 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.5s IncrementalHoareTripleChecker+Time [2024-09-20 18:41:50,740 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 438 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 738 Invalid, 15 Unknown, 0 Unchecked, 60.5s Time] [2024-09-20 18:41:50,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-20 18:41:50,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 59. [2024-09-20 18:41:50,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 18:41:50,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2024-09-20 18:41:50,752 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 35 [2024-09-20 18:41:50,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:41:50,752 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2024-09-20 18:41:50,752 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 18:41:50,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:41:50,753 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2024-09-20 18:41:50,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-20 18:41:50,753 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:41:50,753 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:41:50,766 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-20 18:41:50,957 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:41:50,958 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:41:50,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:41:50,958 INFO L85 PathProgramCache]: Analyzing trace with hash -178294159, now seen corresponding path program 1 times [2024-09-20 18:41:50,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:41:50,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687196349] [2024-09-20 18:41:50,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:41:50,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:41:50,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:51,517 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:41:51,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:51,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-20 18:41:51,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:51,522 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:41:51,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:41:51,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687196349] [2024-09-20 18:41:51,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687196349] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:41:51,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114010242] [2024-09-20 18:41:51,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:41:51,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:41:51,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:41:51,527 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:41:51,532 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 18:41:51,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:51,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-20 18:41:51,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:41:51,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2024-09-20 18:41:51,852 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 18:41:51,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 20 [2024-09-20 18:41:52,065 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 18:41:52,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2024-09-20 18:41:52,112 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 18:41:52,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:41:52,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 66 [2024-09-20 18:41:52,479 INFO L349 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2024-09-20 18:41:52,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 494 treesize of output 426 [2024-09-20 18:41:52,637 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 18:41:52,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114010242] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:41:52,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:41:52,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 15] total 44 [2024-09-20 18:41:52,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397313048] [2024-09-20 18:41:52,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:41:52,638 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-20 18:41:52,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:41:52,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-20 18:41:52,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1705, Unknown=0, NotChecked=0, Total=1892 [2024-09-20 18:41:52,640 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 44 states, 42 states have (on average 1.9523809523809523) internal successors, (82), 41 states have internal predecessors, (82), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 18:41:54,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:41:54,320 INFO L93 Difference]: Finished difference Result 166 states and 206 transitions. [2024-09-20 18:41:54,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-20 18:41:54,320 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 1.9523809523809523) internal successors, (82), 41 states have internal predecessors, (82), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2024-09-20 18:41:54,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:41:54,321 INFO L225 Difference]: With dead ends: 166 [2024-09-20 18:41:54,321 INFO L226 Difference]: Without dead ends: 130 [2024-09-20 18:41:54,323 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1741 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=657, Invalid=5663, Unknown=0, NotChecked=0, Total=6320 [2024-09-20 18:41:54,324 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 115 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-20 18:41:54,324 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 567 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-20 18:41:54,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-09-20 18:41:54,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 93. [2024-09-20 18:41:54,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 78 states have (on average 1.2820512820512822) internal successors, (100), 81 states have internal predecessors, (100), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 18:41:54,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 115 transitions. [2024-09-20 18:41:54,344 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 115 transitions. Word has length 38 [2024-09-20 18:41:54,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:41:54,345 INFO L474 AbstractCegarLoop]: Abstraction has 93 states and 115 transitions. [2024-09-20 18:41:54,345 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 1.9523809523809523) internal successors, (82), 41 states have internal predecessors, (82), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 18:41:54,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:41:54,347 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 115 transitions. [2024-09-20 18:41:54,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-20 18:41:54,350 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:41:54,350 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:41:54,364 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-20 18:41:54,553 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:41:54,554 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:41:54,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:41:54,555 INFO L85 PathProgramCache]: Analyzing trace with hash 917365120, now seen corresponding path program 3 times [2024-09-20 18:41:54,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:41:54,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96917699] [2024-09-20 18:41:54,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:41:54,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:41:54,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:54,711 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:41:54,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:54,713 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-20 18:41:54,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:54,717 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-20 18:41:54,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:54,721 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-20 18:41:54,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:41:54,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96917699] [2024-09-20 18:41:54,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96917699] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:41:54,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706653262] [2024-09-20 18:41:54,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:41:54,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:41:54,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:41:54,723 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:41:54,728 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 18:41:54,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-20 18:41:54,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:41:54,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-20 18:41:54,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:41:54,928 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-20 18:41:54,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:41:55,106 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-20 18:41:55,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706653262] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:41:55,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:41:55,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2024-09-20 18:41:55,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256695961] [2024-09-20 18:41:55,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:41:55,108 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-20 18:41:55,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:41:55,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-20 18:41:55,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-09-20 18:41:55,109 INFO L87 Difference]: Start difference. First operand 93 states and 115 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 18:41:55,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:41:55,325 INFO L93 Difference]: Finished difference Result 212 states and 275 transitions. [2024-09-20 18:41:55,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 18:41:55,325 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 42 [2024-09-20 18:41:55,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:41:55,326 INFO L225 Difference]: With dead ends: 212 [2024-09-20 18:41:55,326 INFO L226 Difference]: Without dead ends: 135 [2024-09-20 18:41:55,327 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2024-09-20 18:41:55,328 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 46 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:41:55,329 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 340 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:41:55,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-09-20 18:41:55,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 118. [2024-09-20 18:41:55,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 103 states have (on average 1.2524271844660195) internal successors, (129), 106 states have internal predecessors, (129), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 18:41:55,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 145 transitions. [2024-09-20 18:41:55,363 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 145 transitions. Word has length 42 [2024-09-20 18:41:55,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:41:55,364 INFO L474 AbstractCegarLoop]: Abstraction has 118 states and 145 transitions. [2024-09-20 18:41:55,364 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 18:41:55,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:41:55,365 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 145 transitions. [2024-09-20 18:41:55,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-20 18:41:55,365 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:41:55,365 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:41:55,383 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-20 18:41:55,566 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:41:55,567 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:41:55,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:41:55,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1981868692, now seen corresponding path program 1 times [2024-09-20 18:41:55,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:41:55,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485095039] [2024-09-20 18:41:55,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:41:55,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:41:55,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:56,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:41:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:56,625 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-20 18:41:56,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:56,628 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:41:56,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:41:56,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485095039] [2024-09-20 18:41:56,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485095039] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:41:56,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769762843] [2024-09-20 18:41:56,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:41:56,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:41:56,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:41:56,630 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:41:56,632 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 18:41:56,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:56,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-09-20 18:41:56,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:41:56,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-09-20 18:41:56,811 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 18:41:56,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 25 [2024-09-20 18:41:56,896 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 18:41:56,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 28 [2024-09-20 18:41:57,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-20 18:41:57,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-20 18:41:57,028 INFO L349 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2024-09-20 18:41:57,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 34 [2024-09-20 18:42:05,245 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 18:42:05,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-09-20 18:42:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 18:42:05,291 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:42:05,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 104 [2024-09-20 18:42:05,961 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 18:42:05,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 3498 treesize of output 3289 [2024-09-20 18:42:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 18:42:07,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769762843] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:42:07,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:42:07,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25, 20] total 52 [2024-09-20 18:42:07,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33948081] [2024-09-20 18:42:07,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:42:07,263 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-09-20 18:42:07,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:42:07,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-09-20 18:42:07,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=2361, Unknown=1, NotChecked=0, Total=2652 [2024-09-20 18:42:07,265 INFO L87 Difference]: Start difference. First operand 118 states and 145 transitions. Second operand has 52 states, 51 states have (on average 1.6274509803921569) internal successors, (83), 49 states have internal predecessors, (83), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-20 18:42:11,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:42:15,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:42:19,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:42:23,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:42:27,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:42:31,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:42:35,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:42:43,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:42:48,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-09-20 18:42:51,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-20 18:42:55,396 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#memory_int#1| |c_main_~#v~0.base|))) (let ((.cse6 (* c_main_~i~0 4)) (.cse2 (= c_main_~i~0 0)) (.cse0 (= 2 c_main_~j~0)) (.cse1 (not |c_main_#t~short9|)) (.cse4 (select .cse3 8))) (and .cse0 (or .cse1 (and .cse2 (<= (select .cse3 0) .cse4))) (forall ((main_~key~0 Int)) (let ((.cse5 (store .cse3 (+ .cse6 |c_main_~#v~0.offset| 4) main_~key~0))) (< (select .cse5 (+ |c_main_~#v~0.offset| 4)) (+ 1 (select .cse5 (+ |c_main_~#v~0.offset| 8)))))) (let ((.cse7 (store .cse3 (+ .cse6 4) c_main_~key~0))) (<= (select .cse7 4) (select .cse7 8))) (or (let ((.cse8 (= c_main_~j~0 1))) (and (or .cse2 (not .cse8)) (or .cse8 (= c_main_~i~0 1)) (not .cse0))) .cse1 (< c_main_~j~0 1)) (<= (select .cse3 4) .cse4) (= |c_main_~#v~0.offset| 0)))) is different from false [2024-09-20 18:43:40,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-20 18:43:44,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-20 18:43:48,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-20 18:43:52,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-20 18:43:56,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-20 18:44:00,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-20 18:44:04,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-20 18:44:08,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-20 18:44:12,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-20 18:44:16,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-20 18:44:20,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-20 18:45:04,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:45:08,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:45:12,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]