./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/linear_sea.ch.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 de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops/linear_sea.ch.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 eb9784c54ab470258ada67babaf5f63148f3484f17edd94b8d28d55553534fa5 --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-de32597-m [2024-09-18 15:30:51,438 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 15:30:51,493 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-18 15:30:51,496 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 15:30:51,498 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 15:30:51,533 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 15:30:51,533 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 15:30:51,534 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 15:30:51,534 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 15:30:51,535 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 15:30:51,535 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 15:30:51,535 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 15:30:51,536 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 15:30:51,536 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 15:30:51,537 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 15:30:51,538 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 15:30:51,538 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 15:30:51,538 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 15:30:51,539 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-18 15:30:51,539 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 15:30:51,539 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 15:30:51,542 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 15:30:51,543 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 15:30:51,543 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 15:30:51,543 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 15:30:51,543 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 15:30:51,544 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 15:30:51,544 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 15:30:51,544 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 15:30:51,544 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 15:30:51,545 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 15:30:51,545 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 15:30:51,545 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:30:51,545 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 15:30:51,546 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 15:30:51,546 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 15:30:51,547 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-18 15:30:51,547 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-18 15:30:51,548 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 15:30:51,548 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 15:30:51,548 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 15:30:51,549 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 15:30:51,549 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb9784c54ab470258ada67babaf5f63148f3484f17edd94b8d28d55553534fa5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 15:30:51,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 15:30:51,835 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 15:30:51,837 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 15:30:51,839 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 15:30:51,839 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 15:30:51,840 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops/linear_sea.ch.c [2024-09-18 15:30:53,227 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 15:30:53,399 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 15:30:53,400 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops/linear_sea.ch.c [2024-09-18 15:30:53,421 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/6992c29ca/ee6b8f090fe2475d9ab373aba65870e9/FLAG1151b5e94 [2024-09-18 15:30:53,439 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/6992c29ca/ee6b8f090fe2475d9ab373aba65870e9 [2024-09-18 15:30:53,442 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 15:30:53,443 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 15:30:53,448 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 15:30:53,448 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 15:30:53,474 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 15:30:53,478 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:30:53" (1/1) ... [2024-09-18 15:30:53,479 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@150e25b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:30:53, skipping insertion in model container [2024-09-18 15:30:53,479 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:30:53" (1/1) ... [2024-09-18 15:30:53,497 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 15:30:53,636 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/linear_sea.ch.c[383,396] [2024-09-18 15:30:53,652 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:30:53,662 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 15:30:53,673 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/linear_sea.ch.c[383,396] [2024-09-18 15:30:53,677 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:30:53,693 INFO L204 MainTranslator]: Completed translation [2024-09-18 15:30:53,693 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:30:53 WrapperNode [2024-09-18 15:30:53,694 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 15:30:53,695 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 15:30:53,696 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 15:30:53,696 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 15:30:53,703 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:30:53" (1/1) ... [2024-09-18 15:30:53,710 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:30:53" (1/1) ... [2024-09-18 15:30:53,719 INFO L138 Inliner]: procedures = 17, calls = 13, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 15:30:53,719 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 15:30:53,720 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 15:30:53,720 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 15:30:53,720 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 15:30:53,731 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:30:53" (1/1) ... [2024-09-18 15:30:53,731 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:30:53" (1/1) ... [2024-09-18 15:30:53,737 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:30:53" (1/1) ... [2024-09-18 15:30:53,759 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-09-18 15:30:53,759 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:30:53" (1/1) ... [2024-09-18 15:30:53,759 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:30:53" (1/1) ... [2024-09-18 15:30:53,765 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:30:53" (1/1) ... [2024-09-18 15:30:53,771 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:30:53" (1/1) ... [2024-09-18 15:30:53,777 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:30:53" (1/1) ... [2024-09-18 15:30:53,778 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:30:53" (1/1) ... [2024-09-18 15:30:53,779 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 15:30:53,780 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 15:30:53,784 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 15:30:53,784 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 15:30:53,785 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:30:53" (1/1) ... [2024-09-18 15:30:53,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:30:53,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:30:53,818 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) [2024-09-18 15:30:53,820 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 [2024-09-18 15:30:53,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 15:30:53,862 INFO L130 BoogieDeclarations]: Found specification of procedure linear_search [2024-09-18 15:30:53,862 INFO L138 BoogieDeclarations]: Found implementation of procedure linear_search [2024-09-18 15:30:53,862 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 15:30:53,862 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 15:30:53,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-18 15:30:53,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-18 15:30:53,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-18 15:30:53,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-18 15:30:53,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 15:30:53,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 15:30:53,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-09-18 15:30:53,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 15:30:53,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 15:30:53,864 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-18 15:30:53,864 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-18 15:30:53,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2024-09-18 15:30:53,864 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2024-09-18 15:30:53,864 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-18 15:30:53,864 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-18 15:30:53,928 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 15:30:53,930 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 15:30:54,091 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-09-18 15:30:54,092 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 15:30:54,110 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 15:30:54,111 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-18 15:30:54,111 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:30:54 BoogieIcfgContainer [2024-09-18 15:30:54,111 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 15:30:54,113 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 15:30:54,113 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 15:30:54,117 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 15:30:54,117 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 03:30:53" (1/3) ... [2024-09-18 15:30:54,118 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39d9fc5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:30:54, skipping insertion in model container [2024-09-18 15:30:54,118 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:30:53" (2/3) ... [2024-09-18 15:30:54,118 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39d9fc5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:30:54, skipping insertion in model container [2024-09-18 15:30:54,118 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:30:54" (3/3) ... [2024-09-18 15:30:54,120 INFO L112 eAbstractionObserver]: Analyzing ICFG linear_sea.ch.c [2024-09-18 15:30:54,135 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 15:30:54,135 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-18 15:30:54,181 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 15:30:54,187 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;@81038df, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 15:30:54,187 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-18 15:30:54,191 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-18 15:30:54,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-18 15:30:54,201 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:30:54,202 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] [2024-09-18 15:30:54,202 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:30:54,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:30:54,207 INFO L85 PathProgramCache]: Analyzing trace with hash 430877326, now seen corresponding path program 1 times [2024-09-18 15:30:54,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:30:54,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044777454] [2024-09-18 15:30:54,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:30:54,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:30:54,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:30:54,484 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:30:54,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:30:54,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:30:54,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:30:54,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:30:54,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:30:54,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:30:54,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:30:54,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044777454] [2024-09-18 15:30:54,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044777454] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:30:54,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:30:54,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-18 15:30:54,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122217186] [2024-09-18 15:30:54,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:30:54,560 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-18 15:30:54,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:30:54,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-18 15:30:54,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-18 15:30:54,588 INFO L87 Difference]: Start difference. First operand has 31 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-18 15:30:54,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:30:54,746 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2024-09-18 15:30:54,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 15:30:54,748 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2024-09-18 15:30:54,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:30:54,755 INFO L225 Difference]: With dead ends: 49 [2024-09-18 15:30:54,756 INFO L226 Difference]: Without dead ends: 24 [2024-09-18 15:30:54,759 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:30:54,765 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 34 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:30:54,766 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 21 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:30:54,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-18 15:30:54,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-09-18 15:30:54,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-18 15:30:54,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2024-09-18 15:30:54,806 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2024-09-18 15:30:54,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:30:54,807 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2024-09-18 15:30:54,807 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-18 15:30:54,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:30:54,808 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2024-09-18 15:30:54,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-18 15:30:54,809 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:30:54,809 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, 1, 1] [2024-09-18 15:30:54,809 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-18 15:30:54,809 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:30:54,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:30:54,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1655871353, now seen corresponding path program 1 times [2024-09-18 15:30:54,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:30:54,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805224304] [2024-09-18 15:30:54,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:30:54,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:30:54,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:30:55,084 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:30:55,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:30:55,106 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:30:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:30:55,111 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:30:55,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:30:55,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:30:55,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:30:55,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805224304] [2024-09-18 15:30:55,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805224304] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:30:55,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:30:55,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-18 15:30:55,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373175795] [2024-09-18 15:30:55,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:30:55,182 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-18 15:30:55,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:30:55,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-18 15:30:55,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-18 15:30:55,184 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-18 15:30:55,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:30:55,370 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2024-09-18 15:30:55,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-18 15:30:55,370 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2024-09-18 15:30:55,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:30:55,371 INFO L225 Difference]: With dead ends: 32 [2024-09-18 15:30:55,371 INFO L226 Difference]: Without dead ends: 24 [2024-09-18 15:30:55,372 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2024-09-18 15:30:55,373 INFO L434 NwaCegarLoop]: 8 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:30:55,373 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 35 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:30:55,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-18 15:30:55,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-09-18 15:30:55,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-18 15:30:55,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2024-09-18 15:30:55,385 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 23 [2024-09-18 15:30:55,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:30:55,385 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2024-09-18 15:30:55,386 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-18 15:30:55,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:30:55,387 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2024-09-18 15:30:55,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-18 15:30:55,389 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:30:55,389 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, 1, 1] [2024-09-18 15:30:55,389 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-18 15:30:55,389 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:30:55,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:30:55,390 INFO L85 PathProgramCache]: Analyzing trace with hash 86938982, now seen corresponding path program 1 times [2024-09-18 15:30:55,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:30:55,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147490499] [2024-09-18 15:30:55,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:30:55,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:30:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:30:56,144 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:30:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:30:56,158 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:30:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:30:56,187 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:30:56,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:30:56,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:30:56,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:30:56,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147490499] [2024-09-18 15:30:56,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147490499] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:30:56,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:30:56,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-09-18 15:30:56,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72594297] [2024-09-18 15:30:56,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:30:56,350 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-18 15:30:56,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:30:56,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-18 15:30:56,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-09-18 15:30:56,351 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 12 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-18 15:30:56,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:30:56,710 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2024-09-18 15:30:56,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-18 15:30:56,710 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 23 [2024-09-18 15:30:56,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:30:56,711 INFO L225 Difference]: With dead ends: 36 [2024-09-18 15:30:56,712 INFO L226 Difference]: Without dead ends: 27 [2024-09-18 15:30:56,713 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2024-09-18 15:30:56,714 INFO L434 NwaCegarLoop]: 7 mSDtfsCounter, 63 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:30:56,716 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 25 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:30:56,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-18 15:30:56,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-09-18 15:30:56,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-18 15:30:56,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2024-09-18 15:30:56,731 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 23 [2024-09-18 15:30:56,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:30:56,732 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2024-09-18 15:30:56,732 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-18 15:30:56,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:30:56,733 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2024-09-18 15:30:56,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-18 15:30:56,734 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:30:56,734 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, 1] [2024-09-18 15:30:56,734 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-18 15:30:56,734 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:30:56,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:30:56,735 INFO L85 PathProgramCache]: Analyzing trace with hash -2127576749, now seen corresponding path program 1 times [2024-09-18 15:30:56,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:30:56,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58852353] [2024-09-18 15:30:56,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:30:56,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:30:56,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:30:56,855 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:30:56,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:30:56,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:30:56,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:30:56,869 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:30:56,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:30:57,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:30:57,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:30:57,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58852353] [2024-09-18 15:30:57,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58852353] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:30:57,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265950455] [2024-09-18 15:30:57,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:30:57,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:30:57,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:30:57,016 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) [2024-09-18 15:30:57,017 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-18 15:30:57,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:30:57,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-18 15:30:57,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:30:57,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-09-18 15:30:57,262 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 77 treesize of output 63 [2024-09-18 15:30:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:30:57,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:30:58,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:30:58,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265950455] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:30:58,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:30:58,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 8] total 26 [2024-09-18 15:30:58,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272957424] [2024-09-18 15:30:58,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:30:58,697 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-18 15:30:58,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:30:58,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-18 15:30:58,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2024-09-18 15:30:58,700 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 26 states, 24 states have (on average 1.75) internal successors, (42), 22 states have internal predecessors, (42), 4 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-18 15:31:00,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:31:00,990 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2024-09-18 15:31:00,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-18 15:31:00,990 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.75) internal successors, (42), 22 states have internal predecessors, (42), 4 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 26 [2024-09-18 15:31:00,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:31:00,991 INFO L225 Difference]: With dead ends: 59 [2024-09-18 15:31:00,991 INFO L226 Difference]: Without dead ends: 40 [2024-09-18 15:31:00,992 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=538, Invalid=1912, Unknown=0, NotChecked=0, Total=2450 [2024-09-18 15:31:00,995 INFO L434 NwaCegarLoop]: 8 mSDtfsCounter, 198 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-18 15:31:00,996 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 38 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-18 15:31:00,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-09-18 15:31:01,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2024-09-18 15:31:01,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-18 15:31:01,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2024-09-18 15:31:01,020 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 26 [2024-09-18 15:31:01,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:31:01,021 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2024-09-18 15:31:01,022 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.75) internal successors, (42), 22 states have internal predecessors, (42), 4 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-18 15:31:01,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:01,022 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2024-09-18 15:31:01,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-18 15:31:01,023 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:31:01,023 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:31:01,040 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-18 15:31:01,227 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:01,228 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:31:01,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:01,228 INFO L85 PathProgramCache]: Analyzing trace with hash -166112124, now seen corresponding path program 1 times [2024-09-18 15:31:01,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:31:01,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132445734] [2024-09-18 15:31:01,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:01,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:31:01,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:01,712 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:31:01,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:01,722 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:31:01,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:01,729 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:31:01,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:02,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:31:02,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:31:02,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132445734] [2024-09-18 15:31:02,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132445734] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:31:02,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105706458] [2024-09-18 15:31:02,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:02,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:02,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:31:02,430 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) [2024-09-18 15:31:02,434 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-18 15:31:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:02,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-18 15:31:02,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:31:02,572 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 71 treesize of output 58 [2024-09-18 15:31:02,576 WARN L214 Elim1Store]: Array PQE input equivalent to false [2024-09-18 15:31:02,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2024-09-18 15:31:03,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:31:03,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:31:05,939 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 60 treesize of output 56 [2024-09-18 15:31:05,952 INFO L349 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2024-09-18 15:31:05,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 1 [2024-09-18 15:31:05,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:31:05,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105706458] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:31:05,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:31:05,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 39 [2024-09-18 15:31:05,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407505657] [2024-09-18 15:31:05,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:31:05,961 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-18 15:31:05,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:31:05,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-18 15:31:05,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1288, Unknown=0, NotChecked=0, Total=1482 [2024-09-18 15:31:05,963 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 39 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 36 states have internal predecessors, (52), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-18 15:31:21,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:31:21,208 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2024-09-18 15:31:21,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-18 15:31:21,209 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 36 states have internal predecessors, (52), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) Word has length 29 [2024-09-18 15:31:21,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:31:21,210 INFO L225 Difference]: With dead ends: 78 [2024-09-18 15:31:21,210 INFO L226 Difference]: Without dead ends: 62 [2024-09-18 15:31:21,212 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1453 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=1117, Invalid=5200, Unknown=3, NotChecked=0, Total=6320 [2024-09-18 15:31:21,213 INFO L434 NwaCegarLoop]: 8 mSDtfsCounter, 174 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-18 15:31:21,214 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 75 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-18 15:31:21,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-09-18 15:31:21,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2024-09-18 15:31:21,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-18 15:31:21,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2024-09-18 15:31:21,235 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 29 [2024-09-18 15:31:21,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:31:21,235 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2024-09-18 15:31:21,235 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 36 states have internal predecessors, (52), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-18 15:31:21,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:21,236 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2024-09-18 15:31:21,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-18 15:31:21,236 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:31:21,237 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:31:21,250 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-18 15:31:21,437 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:21,437 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:31:21,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:21,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1383275185, now seen corresponding path program 2 times [2024-09-18 15:31:21,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:31:21,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420362864] [2024-09-18 15:31:21,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:21,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:31:21,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:22,067 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:31:22,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:22,093 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:31:22,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:22,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:31:22,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:22,706 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:31:22,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:31:22,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420362864] [2024-09-18 15:31:22,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420362864] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:31:22,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890061487] [2024-09-18 15:31:22,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:31:22,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:22,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:31:22,709 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) [2024-09-18 15:31:22,710 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-18 15:31:22,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:31:22,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:31:22,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-18 15:31:22,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:31:22,869 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 71 treesize of output 58 [2024-09-18 15:31:22,875 WARN L214 Elim1Store]: Array PQE input equivalent to false [2024-09-18 15:31:22,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2024-09-18 15:31:23,406 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:31:23,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:31:24,124 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 60 treesize of output 56 [2024-09-18 15:31:24,133 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 15:31:24,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 119 [2024-09-18 15:31:24,154 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 15:31:24,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 45 treesize of output 28 [2024-09-18 15:31:24,200 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:31:24,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890061487] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:31:24,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:31:24,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 11] total 35 [2024-09-18 15:31:24,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250800186] [2024-09-18 15:31:24,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:31:24,201 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-18 15:31:24,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:31:24,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-18 15:31:24,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2024-09-18 15:31:24,202 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 35 states, 31 states have (on average 2.0) internal successors, (62), 32 states have internal predecessors, (62), 9 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-18 15:31:26,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:31:26,051 INFO L93 Difference]: Finished difference Result 87 states and 105 transitions. [2024-09-18 15:31:26,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-18 15:31:26,052 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 31 states have (on average 2.0) internal successors, (62), 32 states have internal predecessors, (62), 9 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 32 [2024-09-18 15:31:26,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:31:26,053 INFO L225 Difference]: With dead ends: 87 [2024-09-18 15:31:26,053 INFO L226 Difference]: Without dead ends: 45 [2024-09-18 15:31:26,054 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=593, Invalid=2947, Unknown=0, NotChecked=0, Total=3540 [2024-09-18 15:31:26,055 INFO L434 NwaCegarLoop]: 7 mSDtfsCounter, 157 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-18 15:31:26,055 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 55 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-18 15:31:26,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-18 15:31:26,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2024-09-18 15:31:26,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-18 15:31:26,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2024-09-18 15:31:26,081 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 32 [2024-09-18 15:31:26,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:31:26,081 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2024-09-18 15:31:26,081 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 31 states have (on average 2.0) internal successors, (62), 32 states have internal predecessors, (62), 9 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-18 15:31:26,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:26,082 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2024-09-18 15:31:26,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-18 15:31:26,082 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:31:26,082 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:31:26,099 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-18 15:31:26,283 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-18 15:31:26,283 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:31:26,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:26,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1560094502, now seen corresponding path program 2 times [2024-09-18 15:31:26,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:31:26,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718408877] [2024-09-18 15:31:26,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:26,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:31:26,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:26,439 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:31:26,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:26,456 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:31:26,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:26,460 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:31:26,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:26,600 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-18 15:31:26,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:31:26,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718408877] [2024-09-18 15:31:26,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718408877] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:31:26,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669483519] [2024-09-18 15:31:26,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:31:26,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:26,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:31:26,603 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) [2024-09-18 15:31:26,604 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-18 15:31:26,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-09-18 15:31:26,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:31:26,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-18 15:31:26,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:31:26,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-09-18 15:31:26,747 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 77 treesize of output 63 [2024-09-18 15:31:27,402 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-18 15:31:27,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:31:28,394 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-18 15:31:28,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669483519] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:31:28,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:31:28,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 7] total 25 [2024-09-18 15:31:28,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612309307] [2024-09-18 15:31:28,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:31:28,396 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-18 15:31:28,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:31:28,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-18 15:31:28,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2024-09-18 15:31:28,398 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 25 states, 23 states have (on average 2.0) internal successors, (46), 21 states have internal predecessors, (46), 6 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-18 15:31:29,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:31:29,192 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2024-09-18 15:31:29,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-18 15:31:29,192 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0) internal successors, (46), 21 states have internal predecessors, (46), 6 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) Word has length 35 [2024-09-18 15:31:29,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:31:29,193 INFO L225 Difference]: With dead ends: 52 [2024-09-18 15:31:29,193 INFO L226 Difference]: Without dead ends: 43 [2024-09-18 15:31:29,194 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=318, Invalid=1322, Unknown=0, NotChecked=0, Total=1640 [2024-09-18 15:31:29,194 INFO L434 NwaCegarLoop]: 7 mSDtfsCounter, 100 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:31:29,194 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 46 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:31:29,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-18 15:31:29,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2024-09-18 15:31:29,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-18 15:31:29,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2024-09-18 15:31:29,215 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 35 [2024-09-18 15:31:29,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:31:29,216 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2024-09-18 15:31:29,216 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0) internal successors, (46), 21 states have internal predecessors, (46), 6 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-18 15:31:29,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:29,216 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2024-09-18 15:31:29,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-18 15:31:29,217 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:31:29,217 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:31:29,230 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-18 15:31:29,417 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:29,418 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:31:29,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:29,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1167067492, now seen corresponding path program 3 times [2024-09-18 15:31:29,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:31:29,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574591812] [2024-09-18 15:31:29,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:29,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:31:29,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:29,920 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:31:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:29,942 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:31:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:29,949 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:31:29,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:32,694 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:31:32,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:31:32,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574591812] [2024-09-18 15:31:32,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574591812] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:31:32,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663314638] [2024-09-18 15:31:32,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:31:32,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:32,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:31:32,696 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) [2024-09-18 15:31:32,697 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-18 15:31:32,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-18 15:31:32,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:31:32,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-18 15:31:32,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:31:32,934 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 71 treesize of output 58 [2024-09-18 15:31:32,937 WARN L214 Elim1Store]: Array PQE input equivalent to false [2024-09-18 15:31:32,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2024-09-18 15:31:35,426 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:31:35,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:31:52,612 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 60 treesize of output 56 [2024-09-18 15:31:52,618 INFO L349 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2024-09-18 15:31:52,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 1 [2024-09-18 15:31:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:31:52,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663314638] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:31:52,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:31:52,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 17] total 54 [2024-09-18 15:31:52,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845529323] [2024-09-18 15:31:52,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:31:52,627 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-09-18 15:31:52,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:31:52,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-09-18 15:31:52,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=2625, Unknown=2, NotChecked=0, Total=2862 [2024-09-18 15:31:52,629 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 54 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 51 states have internal predecessors, (73), 9 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-18 15:34:00,123 WARN L293 SmtUtils]: Spent 1.72m on a formula simplification. DAG size of input: 229 DAG size of output: 191 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)