./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ca4ee3dd Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.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 ac02a57e98f6481647f49b84c91fda6d0505e35fbffb37ed6b508f20e911a1af --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-ca4ee3d-m [2024-09-20 20:03:46,290 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 20:03:46,359 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 20:03:46,362 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 20:03:46,364 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 20:03:46,399 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 20:03:46,399 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 20:03:46,400 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 20:03:46,400 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 20:03:46,401 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 20:03:46,401 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 20:03:46,402 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 20:03:46,403 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 20:03:46,403 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 20:03:46,406 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 20:03:46,406 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 20:03:46,406 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 20:03:46,407 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 20:03:46,407 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 20:03:46,407 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 20:03:46,407 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 20:03:46,412 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 20:03:46,413 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 20:03:46,413 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 20:03:46,413 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 20:03:46,413 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 20:03:46,413 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 20:03:46,414 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 20:03:46,414 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 20:03:46,414 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 20:03:46,414 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 20:03:46,414 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 20:03:46,415 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 20:03:46,415 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 20:03:46,417 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 20:03:46,417 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 20:03:46,417 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 20:03:46,418 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 20:03:46,418 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 20:03:46,418 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 20:03:46,419 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 20:03:46,419 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 20:03:46,420 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac02a57e98f6481647f49b84c91fda6d0505e35fbffb37ed6b508f20e911a1af Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 20:03:46,693 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 20:03:46,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 20:03:46,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 20:03:46,722 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 20:03:46,722 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 20:03:46,723 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c [2024-09-20 20:03:48,122 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 20:03:48,284 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 20:03:48,284 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c [2024-09-20 20:03:48,291 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/e40a0a167/e079effb8a164ec79e6ced249cc32931/FLAGc059732c6 [2024-09-20 20:03:48,303 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/e40a0a167/e079effb8a164ec79e6ced249cc32931 [2024-09-20 20:03:48,306 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 20:03:48,307 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 20:03:48,308 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 20:03:48,308 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 20:03:48,313 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 20:03:48,313 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 08:03:48" (1/1) ... [2024-09-20 20:03:48,314 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e2bcf45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:03:48, skipping insertion in model container [2024-09-20 20:03:48,314 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 08:03:48" (1/1) ... [2024-09-20 20:03:48,331 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 20:03:48,464 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/recursified_nla-digbench/recursified_sqrt1-ll.c[1052,1065] [2024-09-20 20:03:48,479 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 20:03:48,488 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 20:03:48,498 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/recursified_nla-digbench/recursified_sqrt1-ll.c[1052,1065] [2024-09-20 20:03:48,507 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 20:03:48,530 INFO L204 MainTranslator]: Completed translation [2024-09-20 20:03:48,530 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:03:48 WrapperNode [2024-09-20 20:03:48,531 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 20:03:48,532 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 20:03:48,533 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 20:03:48,533 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 20:03:48,540 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:03:48" (1/1) ... [2024-09-20 20:03:48,547 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:03:48" (1/1) ... [2024-09-20 20:03:48,553 INFO L138 Inliner]: procedures = 16, calls = 58, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 20:03:48,553 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 20:03:48,554 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 20:03:48,554 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 20:03:48,554 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 20:03:48,565 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:03:48" (1/1) ... [2024-09-20 20:03:48,565 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:03:48" (1/1) ... [2024-09-20 20:03:48,572 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:03:48" (1/1) ... [2024-09-20 20:03:48,600 INFO L175 MemorySlicer]: Split 33 memory accesses to 5 slices as follows [2, 9, 2, 12, 8]. 36 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 7 writes are split as follows [0, 2, 1, 2, 2]. [2024-09-20 20:03:48,601 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:03:48" (1/1) ... [2024-09-20 20:03:48,601 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:03:48" (1/1) ... [2024-09-20 20:03:48,609 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:03:48" (1/1) ... [2024-09-20 20:03:48,614 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:03:48" (1/1) ... [2024-09-20 20:03:48,616 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:03:48" (1/1) ... [2024-09-20 20:03:48,618 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:03:48" (1/1) ... [2024-09-20 20:03:48,622 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 20:03:48,627 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 20:03:48,627 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 20:03:48,627 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 20:03:48,628 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:03:48" (1/1) ... [2024-09-20 20:03:48,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 20:03:48,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:03:48,674 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-20 20:03:48,677 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-20 20:03:48,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 20:03:48,721 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 20:03:48,721 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 20:03:48,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 20:03:48,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-20 20:03:48,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-20 20:03:48,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-20 20:03:48,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-20 20:03:48,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-20 20:03:48,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-20 20:03:48,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-20 20:03:48,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-20 20:03:48,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-20 20:03:48,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-20 20:03:48,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 20:03:48,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 20:03:48,723 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_29_to_40_0 [2024-09-20 20:03:48,724 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_29_to_40_0 [2024-09-20 20:03:48,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 20:03:48,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 20:03:48,724 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-20 20:03:48,724 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-20 20:03:48,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-20 20:03:48,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-20 20:03:48,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-20 20:03:48,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 20:03:48,725 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 20:03:48,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-20 20:03:48,810 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 20:03:48,812 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 20:03:49,009 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-09-20 20:03:49,009 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 20:03:49,027 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 20:03:49,027 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-20 20:03:49,028 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 08:03:49 BoogieIcfgContainer [2024-09-20 20:03:49,028 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 20:03:49,030 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 20:03:49,030 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 20:03:49,033 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 20:03:49,033 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 08:03:48" (1/3) ... [2024-09-20 20:03:49,034 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cf45eee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 08:03:49, skipping insertion in model container [2024-09-20 20:03:49,034 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:03:48" (2/3) ... [2024-09-20 20:03:49,034 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cf45eee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 08:03:49, skipping insertion in model container [2024-09-20 20:03:49,034 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 08:03:49" (3/3) ... [2024-09-20 20:03:49,036 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_sqrt1-ll.c [2024-09-20 20:03:49,050 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 20:03:49,051 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 20:03:49,098 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 20:03:49,103 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;@88deda8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 20:03:49,103 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 20:03:49,106 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 20 states have internal predecessors, (22), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 20:03:49,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-20 20:03:49,112 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:03:49,113 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:03:49,114 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:03:49,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:03:49,118 INFO L85 PathProgramCache]: Analyzing trace with hash 793561350, now seen corresponding path program 1 times [2024-09-20 20:03:49,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:03:49,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121040840] [2024-09-20 20:03:49,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:03:49,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:03:49,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:49,902 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 20:03:49,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 20:03:49,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:03:49,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121040840] [2024-09-20 20:03:49,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121040840] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 20:03:49,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 20:03:49,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-20 20:03:49,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547891763] [2024-09-20 20:03:49,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 20:03:49,920 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 20:03:49,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:03:49,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 20:03:49,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-20 20:03:49,946 INFO L87 Difference]: Start difference. First operand has 34 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 20 states have internal predecessors, (22), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 20:03:50,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:03:50,204 INFO L93 Difference]: Finished difference Result 80 states and 113 transitions. [2024-09-20 20:03:50,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 20:03:50,206 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-09-20 20:03:50,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:03:50,214 INFO L225 Difference]: With dead ends: 80 [2024-09-20 20:03:50,215 INFO L226 Difference]: Without dead ends: 48 [2024-09-20 20:03:50,220 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-20 20:03:50,226 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 17 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 20:03:50,228 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 160 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 20:03:50,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-20 20:03:50,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2024-09-20 20:03:50,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 28 states have internal predecessors, (29), 13 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2024-09-20 20:03:50,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2024-09-20 20:03:50,274 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 12 [2024-09-20 20:03:50,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:03:50,275 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2024-09-20 20:03:50,276 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 20:03:50,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:03:50,278 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2024-09-20 20:03:50,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-20 20:03:50,279 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:03:50,279 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:03:50,279 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 20:03:50,279 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:03:50,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:03:50,280 INFO L85 PathProgramCache]: Analyzing trace with hash -179619090, now seen corresponding path program 1 times [2024-09-20 20:03:50,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:03:50,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644201520] [2024-09-20 20:03:50,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:03:50,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:03:50,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:03:50,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1112821598] [2024-09-20 20:03:50,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:03:50,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:03:50,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:03:50,321 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:03:50,323 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 20:03:50,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:50,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-20 20:03:50,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:03:50,470 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 11 treesize of output 7 [2024-09-20 20:03:50,477 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 11 treesize of output 7 [2024-09-20 20:03:50,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 20:03:50,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:03:51,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2024-09-20 20:03:51,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 20:03:51,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:03:51,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644201520] [2024-09-20 20:03:51,165 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:03:51,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112821598] [2024-09-20 20:03:51,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112821598] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 20:03:51,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 20:03:51,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2024-09-20 20:03:51,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085028978] [2024-09-20 20:03:51,167 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 20:03:51,168 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 20:03:51,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:03:51,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 20:03:51,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2024-09-20 20:03:51,170 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 7 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 20:03:56,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.84s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-20 20:03:56,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:03:56,289 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2024-09-20 20:03:56,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-20 20:03:56,291 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 7 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 18 [2024-09-20 20:03:56,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:03:56,294 INFO L225 Difference]: With dead ends: 72 [2024-09-20 20:03:56,294 INFO L226 Difference]: Without dead ends: 70 [2024-09-20 20:03:56,296 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2024-09-20 20:03:56,297 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 59 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-09-20 20:03:56,298 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 175 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2024-09-20 20:03:56,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-09-20 20:03:56,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2024-09-20 20:03:56,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 41 states have internal predecessors, (43), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (15), 14 states have call predecessors, (15), 13 states have call successors, (15) [2024-09-20 20:03:56,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2024-09-20 20:03:56,336 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 18 [2024-09-20 20:03:56,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:03:56,336 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2024-09-20 20:03:56,337 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 7 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 20:03:56,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:03:56,337 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2024-09-20 20:03:56,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-20 20:03:56,338 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:03:56,339 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] [2024-09-20 20:03:56,357 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-20 20:03:56,539 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:03:56,540 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:03:56,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:03:56,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1495099348, now seen corresponding path program 1 times [2024-09-20 20:03:56,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:03:56,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717071404] [2024-09-20 20:03:56,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:03:56,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:03:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:03:56,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [345423400] [2024-09-20 20:03:56,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:03:56,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:03:56,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:03:56,571 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:03:56,575 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 20:03:56,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:56,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-20 20:03:56,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:03:56,660 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 11 treesize of output 7 [2024-09-20 20:03:56,665 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 11 treesize of output 7 [2024-09-20 20:03:56,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 20:03:56,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:03:57,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 20:03:57,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:03:57,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717071404] [2024-09-20 20:03:57,015 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:03:57,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345423400] [2024-09-20 20:03:57,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345423400] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 20:03:57,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:03:57,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-09-20 20:03:57,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690730132] [2024-09-20 20:03:57,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 20:03:57,016 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 20:03:57,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:03:57,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 20:03:57,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-20 20:03:57,017 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 20:03:57,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:03:57,291 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2024-09-20 20:03:57,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 20:03:57,292 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-09-20 20:03:57,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:03:57,293 INFO L225 Difference]: With dead ends: 77 [2024-09-20 20:03:57,294 INFO L226 Difference]: Without dead ends: 75 [2024-09-20 20:03:57,294 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-09-20 20:03:57,295 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 20:03:57,295 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 121 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 20:03:57,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-20 20:03:57,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2024-09-20 20:03:57,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 47 states have internal predecessors, (49), 16 states have call successors, (16), 11 states have call predecessors, (16), 11 states have return successors, (15), 14 states have call predecessors, (15), 13 states have call successors, (15) [2024-09-20 20:03:57,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2024-09-20 20:03:57,334 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 24 [2024-09-20 20:03:57,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:03:57,334 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2024-09-20 20:03:57,335 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 20:03:57,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:03:57,335 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2024-09-20 20:03:57,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-20 20:03:57,336 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:03:57,336 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:03:57,353 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 20:03:57,536 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:03:57,537 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:03:57,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:03:57,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1496297149, now seen corresponding path program 1 times [2024-09-20 20:03:57,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:03:57,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300212077] [2024-09-20 20:03:57,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:03:57,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:03:57,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:58,146 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 20:03:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:58,150 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-20 20:03:58,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:58,164 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 20:03:58,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:58,173 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-20 20:03:58,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 20:03:58,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:03:58,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300212077] [2024-09-20 20:03:58,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300212077] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:03:58,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35949161] [2024-09-20 20:03:58,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:03:58,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:03:58,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:03:58,187 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:03:58,191 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 20:03:58,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:58,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-20 20:03:58,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:03:58,489 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 33 treesize of output 21 [2024-09-20 20:03:58,492 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 33 treesize of output 21 [2024-09-20 20:03:58,538 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 23 treesize of output 15 [2024-09-20 20:03:58,541 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 19 treesize of output 11 [2024-09-20 20:03:58,591 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 20:03:58,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:04:03,148 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 20:04:03,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35949161] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 20:04:03,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 20:04:03,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 21 [2024-09-20 20:04:03,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356077915] [2024-09-20 20:04:03,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 20:04:03,149 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 20:04:03,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:04:03,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 20:04:03,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=356, Unknown=1, NotChecked=0, Total=420 [2024-09-20 20:04:03,151 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand has 21 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (17), 7 states have call predecessors, (17), 4 states have return successors, (10), 3 states have call predecessors, (10), 5 states have call successors, (10) [2024-09-20 20:04:05,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:04:05,804 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2024-09-20 20:04:05,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-20 20:04:05,805 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (17), 7 states have call predecessors, (17), 4 states have return successors, (10), 3 states have call predecessors, (10), 5 states have call successors, (10) Word has length 34 [2024-09-20 20:04:05,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:04:05,807 INFO L225 Difference]: With dead ends: 95 [2024-09-20 20:04:05,807 INFO L226 Difference]: Without dead ends: 93 [2024-09-20 20:04:05,807 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=155, Invalid=774, Unknown=1, NotChecked=0, Total=930 [2024-09-20 20:04:05,808 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 64 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-20 20:04:05,808 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 160 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-09-20 20:04:05,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-09-20 20:04:05,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2024-09-20 20:04:05,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 50 states have (on average 1.08) internal successors, (54), 53 states have internal predecessors, (54), 17 states have call successors, (17), 12 states have call predecessors, (17), 13 states have return successors, (20), 16 states have call predecessors, (20), 15 states have call successors, (20) [2024-09-20 20:04:05,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2024-09-20 20:04:05,849 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 34 [2024-09-20 20:04:05,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:04:05,850 INFO L474 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2024-09-20 20:04:05,850 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (17), 7 states have call predecessors, (17), 4 states have return successors, (10), 3 states have call predecessors, (10), 5 states have call successors, (10) [2024-09-20 20:04:05,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:04:05,851 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2024-09-20 20:04:05,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-20 20:04:05,852 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:04:05,852 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, 1, 1] [2024-09-20 20:04:05,869 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-20 20:04:06,056 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:04:06,057 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:04:06,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:04:06,057 INFO L85 PathProgramCache]: Analyzing trace with hash 2049263454, now seen corresponding path program 1 times [2024-09-20 20:04:06,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:04:06,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239442271] [2024-09-20 20:04:06,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:04:06,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:04:06,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:06,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 20:04:06,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:06,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 20:04:06,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:06,700 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:04:06,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:06,704 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-20 20:04:06,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:06,708 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 20:04:06,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:06,718 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 20:04:06,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:04:06,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239442271] [2024-09-20 20:04:06,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239442271] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 20:04:06,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 20:04:06,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-20 20:04:06,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633415850] [2024-09-20 20:04:06,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 20:04:06,720 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 20:04:06,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:04:06,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 20:04:06,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-20 20:04:06,720 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-20 20:04:07,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:04:07,590 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2024-09-20 20:04:07,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 20:04:07,591 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 34 [2024-09-20 20:04:07,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:04:07,594 INFO L225 Difference]: With dead ends: 92 [2024-09-20 20:04:07,595 INFO L226 Difference]: Without dead ends: 90 [2024-09-20 20:04:07,595 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-09-20 20:04:07,596 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 23 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-20 20:04:07,597 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 65 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-20 20:04:07,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-09-20 20:04:07,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2024-09-20 20:04:07,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 58 states have internal predecessors, (59), 18 states have call successors, (18), 13 states have call predecessors, (18), 15 states have return successors, (22), 17 states have call predecessors, (22), 16 states have call successors, (22) [2024-09-20 20:04:07,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2024-09-20 20:04:07,654 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 34 [2024-09-20 20:04:07,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:04:07,654 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2024-09-20 20:04:07,655 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-20 20:04:07,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:04:07,655 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2024-09-20 20:04:07,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-20 20:04:07,656 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:04:07,656 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, 1, 1, 1, 1, 1] [2024-09-20 20:04:07,656 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-20 20:04:07,657 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:04:07,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:04:07,657 INFO L85 PathProgramCache]: Analyzing trace with hash 863672261, now seen corresponding path program 1 times [2024-09-20 20:04:07,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:04:07,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711316932] [2024-09-20 20:04:07,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:04:07,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:04:07,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:04:07,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [167892592] [2024-09-20 20:04:07,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:04:07,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:04:07,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:04:07,678 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:04:07,683 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 20:04:07,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:07,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-20 20:04:07,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:04:07,785 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 11 treesize of output 7 [2024-09-20 20:04:07,810 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 11 treesize of output 7 [2024-09-20 20:04:08,530 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 20:04:08,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:04:09,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:04:09,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711316932] [2024-09-20 20:04:09,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:04:09,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167892592] [2024-09-20 20:04:09,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167892592] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:04:09,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:04:09,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-20 20:04:09,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125790501] [2024-09-20 20:04:09,263 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:04:09,263 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 20:04:09,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:04:09,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 20:04:09,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-09-20 20:04:09,264 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-20 20:04:10,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:04:10,402 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2024-09-20 20:04:10,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 20:04:10,403 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2024-09-20 20:04:10,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:04:10,404 INFO L225 Difference]: With dead ends: 105 [2024-09-20 20:04:10,404 INFO L226 Difference]: Without dead ends: 101 [2024-09-20 20:04:10,404 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-09-20 20:04:10,405 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 26 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-20 20:04:10,405 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 65 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-20 20:04:10,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-09-20 20:04:10,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2024-09-20 20:04:10,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 62 states have (on average 1.064516129032258) internal successors, (66), 64 states have internal predecessors, (66), 20 states have call successors, (20), 15 states have call predecessors, (20), 16 states have return successors, (23), 19 states have call predecessors, (23), 17 states have call successors, (23) [2024-09-20 20:04:10,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2024-09-20 20:04:10,453 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 40 [2024-09-20 20:04:10,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:04:10,454 INFO L474 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2024-09-20 20:04:10,454 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-20 20:04:10,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:04:10,454 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2024-09-20 20:04:10,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-20 20:04:10,455 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:04:10,456 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:04:10,472 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 20:04:10,656 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:04:10,656 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:04:10,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:04:10,657 INFO L85 PathProgramCache]: Analyzing trace with hash 398231530, now seen corresponding path program 1 times [2024-09-20 20:04:10,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:04:10,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497172310] [2024-09-20 20:04:10,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:04:10,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:04:10,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:04:10,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1676793762] [2024-09-20 20:04:10,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:04:10,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:04:10,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:04:10,691 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:04:10,693 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 20:04:10,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:10,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-20 20:04:10,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:04:10,781 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 11 treesize of output 7 [2024-09-20 20:04:10,800 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 11 treesize of output 7 [2024-09-20 20:04:11,635 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-20 20:04:11,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:04:12,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:04:12,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497172310] [2024-09-20 20:04:12,342 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:04:12,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676793762] [2024-09-20 20:04:12,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676793762] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:04:12,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:04:12,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-20 20:04:12,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033716882] [2024-09-20 20:04:12,343 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:04:12,343 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 20:04:12,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:04:12,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 20:04:12,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-09-20 20:04:12,344 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-20 20:04:13,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:04:13,500 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2024-09-20 20:04:13,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 20:04:13,501 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2024-09-20 20:04:13,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:04:13,502 INFO L225 Difference]: With dead ends: 101 [2024-09-20 20:04:13,502 INFO L226 Difference]: Without dead ends: 81 [2024-09-20 20:04:13,502 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-09-20 20:04:13,503 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 18 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 23 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-20 20:04:13,503 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 68 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 157 Invalid, 2 Unknown, 0 Unchecked, 0.8s Time] [2024-09-20 20:04:13,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-20 20:04:13,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-09-20 20:04:13,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 50 states have (on average 1.06) internal successors, (53), 52 states have internal predecessors, (53), 17 states have call successors, (17), 12 states have call predecessors, (17), 13 states have return successors, (20), 16 states have call predecessors, (20), 15 states have call successors, (20) [2024-09-20 20:04:13,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2024-09-20 20:04:13,540 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 46 [2024-09-20 20:04:13,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:04:13,540 INFO L474 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2024-09-20 20:04:13,540 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-20 20:04:13,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:04:13,540 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2024-09-20 20:04:13,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-20 20:04:13,541 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:04:13,542 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:04:13,554 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-20 20:04:13,742 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-20 20:04:13,742 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:04:13,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:04:13,743 INFO L85 PathProgramCache]: Analyzing trace with hash 15363389, now seen corresponding path program 1 times [2024-09-20 20:04:13,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:04:13,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974122955] [2024-09-20 20:04:13,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:04:13,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:04:13,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:14,689 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 20:04:14,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:14,793 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 20:04:14,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:15,899 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:04:15,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:15,920 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-20 20:04:15,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:15,946 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 20:04:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:15,979 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 20:04:15,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:16,226 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:04:16,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:16,231 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-20 20:04:16,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:16,236 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 20:04:16,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-20 20:04:16,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:04:16,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974122955] [2024-09-20 20:04:16,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974122955] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:04:16,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87041209] [2024-09-20 20:04:16,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:04:16,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:04:16,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:04:16,243 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:04:16,246 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 20:04:16,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:16,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-09-20 20:04:16,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:04:16,376 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 11 treesize of output 7 [2024-09-20 20:04:16,401 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 15 treesize of output 1 [2024-09-20 20:04:18,780 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 19 treesize of output 11 [2024-09-20 20:04:18,818 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 19 treesize of output 11 [2024-09-20 20:04:19,107 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-20 20:04:19,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:04:20,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87041209] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:04:20,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 20:04:20,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 22 [2024-09-20 20:04:20,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757003155] [2024-09-20 20:04:20,843 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 20:04:20,845 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-20 20:04:20,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:04:20,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-20 20:04:20,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2024-09-20 20:04:20,846 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 22 states, 16 states have (on average 2.5) internal successors, (40), 19 states have internal predecessors, (40), 10 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) [2024-09-20 20:04:23,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:04:23,770 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2024-09-20 20:04:23,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 20:04:23,771 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 2.5) internal successors, (40), 19 states have internal predecessors, (40), 10 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) Word has length 58 [2024-09-20 20:04:23,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:04:23,772 INFO L225 Difference]: With dead ends: 90 [2024-09-20 20:04:23,772 INFO L226 Difference]: Without dead ends: 88 [2024-09-20 20:04:23,773 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2024-09-20 20:04:23,774 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 43 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-20 20:04:23,774 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 88 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-09-20 20:04:23,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-20 20:04:23,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2024-09-20 20:04:23,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 56 states have internal predecessors, (57), 18 states have call successors, (18), 13 states have call predecessors, (18), 14 states have return successors, (21), 17 states have call predecessors, (21), 16 states have call successors, (21) [2024-09-20 20:04:23,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2024-09-20 20:04:23,820 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 58 [2024-09-20 20:04:23,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:04:23,823 INFO L474 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2024-09-20 20:04:23,823 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 2.5) internal successors, (40), 19 states have internal predecessors, (40), 10 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) [2024-09-20 20:04:23,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:04:23,824 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2024-09-20 20:04:23,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-20 20:04:23,825 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:04:23,825 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:04:23,844 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 20:04:24,031 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:04:24,032 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:04:24,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:04:24,032 INFO L85 PathProgramCache]: Analyzing trace with hash 765303396, now seen corresponding path program 1 times [2024-09-20 20:04:24,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:04:24,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491798296] [2024-09-20 20:04:24,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:04:24,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:04:24,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:04:24,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1044890725] [2024-09-20 20:04:24,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:04:24,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:04:24,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:04:24,055 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:04:24,057 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 20:04:24,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:24,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-09-20 20:04:24,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:04:24,188 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 11 treesize of output 7 [2024-09-20 20:04:24,209 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 11 treesize of output 7 [2024-09-20 20:04:25,528 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 38 treesize of output 30 [2024-09-20 20:04:26,847 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 19 treesize of output 11 [2024-09-20 20:04:26,873 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 19 treesize of output 11 [2024-09-20 20:04:27,671 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 25 proven. 72 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 20:04:27,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:04:29,439 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 81 treesize of output 69 [2024-09-20 20:04:31,434 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 54 treesize of output 30 [2024-09-20 20:04:31,450 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 30 treesize of output 22 [2024-09-20 20:04:35,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:04:35,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491798296] [2024-09-20 20:04:35,381 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:04:35,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044890725] [2024-09-20 20:04:35,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044890725] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:04:35,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:04:35,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-20 20:04:35,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716872760] [2024-09-20 20:04:35,381 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:04:35,382 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-20 20:04:35,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:04:35,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-20 20:04:35,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2024-09-20 20:04:35,383 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand has 20 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 18 states have internal predecessors, (35), 10 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (10), 6 states have call predecessors, (10), 9 states have call successors, (10) [2024-09-20 20:04:40,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:04:40,551 INFO L93 Difference]: Finished difference Result 103 states and 111 transitions. [2024-09-20 20:04:40,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-20 20:04:40,552 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 18 states have internal predecessors, (35), 10 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (10), 6 states have call predecessors, (10), 9 states have call successors, (10) Word has length 64 [2024-09-20 20:04:40,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:04:40,553 INFO L225 Difference]: With dead ends: 103 [2024-09-20 20:04:40,553 INFO L226 Difference]: Without dead ends: 99 [2024-09-20 20:04:40,554 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 54 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=306, Invalid=1764, Unknown=0, NotChecked=0, Total=2070 [2024-09-20 20:04:40,555 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 43 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 52 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-09-20 20:04:40,555 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 82 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 543 Invalid, 4 Unknown, 0 Unchecked, 2.5s Time] [2024-09-20 20:04:40,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-09-20 20:04:40,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2024-09-20 20:04:40,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 62 states have internal predecessors, (64), 20 states have call successors, (20), 15 states have call predecessors, (20), 15 states have return successors, (22), 19 states have call predecessors, (22), 17 states have call successors, (22) [2024-09-20 20:04:40,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2024-09-20 20:04:40,624 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 64 [2024-09-20 20:04:40,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:04:40,624 INFO L474 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2024-09-20 20:04:40,624 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 18 states have internal predecessors, (35), 10 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (10), 6 states have call predecessors, (10), 9 states have call successors, (10) [2024-09-20 20:04:40,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:04:40,625 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2024-09-20 20:04:40,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-20 20:04:40,629 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:04:40,629 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:04:40,645 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-20 20:04:40,833 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:04:40,834 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:04:40,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:04:40,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1393874761, now seen corresponding path program 1 times [2024-09-20 20:04:40,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:04:40,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468876494] [2024-09-20 20:04:40,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:04:40,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:04:40,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:04:40,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [837031444] [2024-09-20 20:04:40,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:04:40,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:04:40,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:04:40,861 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:04:40,864 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 20:04:40,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:40,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-09-20 20:04:40,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:04:41,007 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 11 treesize of output 7 [2024-09-20 20:04:41,033 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 11 treesize of output 7 [2024-09-20 20:04:41,058 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 11 treesize of output 7 [2024-09-20 20:04:43,287 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 25 treesize of output 17 [2024-09-20 20:04:43,375 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-09-20 20:04:43,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 25 [2024-09-20 20:04:43,426 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 19 treesize of output 11 [2024-09-20 20:04:45,206 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 38 proven. 80 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-20 20:04:45,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:04:52,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:04:52,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468876494] [2024-09-20 20:04:52,087 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:04:52,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837031444] [2024-09-20 20:04:52,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837031444] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:04:52,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:04:52,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-20 20:04:52,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958644472] [2024-09-20 20:04:52,087 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:04:52,088 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 20:04:52,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:04:52,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 20:04:52,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=660, Unknown=1, NotChecked=0, Total=756 [2024-09-20 20:04:52,089 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand has 21 states, 16 states have (on average 2.3125) internal successors, (37), 19 states have internal predecessors, (37), 9 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (11), 6 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-20 20:04:56,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:04:56,932 INFO L93 Difference]: Finished difference Result 99 states and 107 transitions. [2024-09-20 20:04:56,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-20 20:04:56,932 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 2.3125) internal successors, (37), 19 states have internal predecessors, (37), 9 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (11), 6 states have call predecessors, (11), 8 states have call successors, (11) Word has length 70 [2024-09-20 20:04:56,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:04:56,934 INFO L225 Difference]: With dead ends: 99 [2024-09-20 20:04:56,934 INFO L226 Difference]: Without dead ends: 77 [2024-09-20 20:04:56,934 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 56 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=239, Invalid=1566, Unknown=1, NotChecked=0, Total=1806 [2024-09-20 20:04:56,935 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 33 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 25 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-09-20 20:04:56,935 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 103 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 499 Invalid, 11 Unknown, 0 Unchecked, 2.4s Time] [2024-09-20 20:04:56,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-20 20:04:56,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-09-20 20:04:56,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 49 states have internal predecessors, (50), 17 states have call successors, (17), 12 states have call predecessors, (17), 11 states have return successors, (18), 15 states have call predecessors, (18), 15 states have call successors, (18) [2024-09-20 20:04:56,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2024-09-20 20:04:56,978 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 70 [2024-09-20 20:04:56,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:04:56,978 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2024-09-20 20:04:56,979 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 2.3125) internal successors, (37), 19 states have internal predecessors, (37), 9 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (11), 6 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-20 20:04:56,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:04:56,979 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2024-09-20 20:04:56,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-20 20:04:56,980 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:04:56,980 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:04:56,998 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-20 20:04:57,184 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:04:57,185 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:04:57,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:04:57,185 INFO L85 PathProgramCache]: Analyzing trace with hash 657256540, now seen corresponding path program 2 times [2024-09-20 20:04:57,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:04:57,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482111030] [2024-09-20 20:04:57,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:04:57,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:04:57,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:58,282 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 20:04:58,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:58,385 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 20:04:58,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:59,751 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:04:59,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:59,762 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-20 20:04:59,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:59,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 20:04:59,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:04:59,783 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 20:04:59,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:00,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:05:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:00,628 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-20 20:05:00,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:00,633 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 20:05:00,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:00,640 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 20:05:00,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:01,570 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:05:01,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:01,583 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-20 20:05:01,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:01,587 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 20:05:01,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:05:01,591 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 31 proven. 16 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2024-09-20 20:05:01,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:05:01,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482111030] [2024-09-20 20:05:01,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482111030] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:05:01,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116478318] [2024-09-20 20:05:01,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 20:05:01,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:05:01,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:05:01,597 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:05:01,598 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 20:05:01,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 20:05:01,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 20:05:01,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-09-20 20:05:01,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:05:01,746 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 11 treesize of output 7 [2024-09-20 20:05:03,116 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 17 treesize of output 9 [2024-09-20 20:05:04,935 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 19 treesize of output 11 [2024-09-20 20:05:05,577 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 85 proven. 31 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-09-20 20:05:05,577 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:05:08,462 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 20:05:08,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 91 [2024-09-20 20:05:09,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116478318] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:05:09,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 20:05:09,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2024-09-20 20:05:09,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680249415] [2024-09-20 20:05:09,717 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 20:05:09,717 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-20 20:05:09,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:05:09,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-20 20:05:09,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2024-09-20 20:05:09,719 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand has 32 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 27 states have internal predecessors, (54), 16 states have call successors, (25), 7 states have call predecessors, (25), 9 states have return successors, (22), 13 states have call predecessors, (22), 14 states have call successors, (22) [2024-09-20 20:05:14,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:05:14,457 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2024-09-20 20:05:14,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-20 20:05:14,457 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 27 states have internal predecessors, (54), 16 states have call successors, (25), 7 states have call predecessors, (25), 9 states have return successors, (22), 13 states have call predecessors, (22), 14 states have call successors, (22) Word has length 82 [2024-09-20 20:05:14,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:05:14,459 INFO L225 Difference]: With dead ends: 88 [2024-09-20 20:05:14,459 INFO L226 Difference]: Without dead ends: 86 [2024-09-20 20:05:14,460 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 100 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=337, Invalid=2213, Unknown=0, NotChecked=0, Total=2550 [2024-09-20 20:05:14,460 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 59 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-09-20 20:05:14,460 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 122 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-09-20 20:05:14,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-09-20 20:05:14,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2024-09-20 20:05:14,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 52 states have internal predecessors, (53), 17 states have call successors, (17), 13 states have call predecessors, (17), 12 states have return successors, (18), 15 states have call predecessors, (18), 15 states have call successors, (18) [2024-09-20 20:05:14,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2024-09-20 20:05:14,512 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 82 [2024-09-20 20:05:14,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:05:14,512 INFO L474 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2024-09-20 20:05:14,513 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 27 states have internal predecessors, (54), 16 states have call successors, (25), 7 states have call predecessors, (25), 9 states have return successors, (22), 13 states have call predecessors, (22), 14 states have call successors, (22) [2024-09-20 20:05:14,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:05:14,513 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2024-09-20 20:05:14,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-20 20:05:14,514 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:05:14,514 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:05:14,531 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-20 20:05:14,714 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-20 20:05:14,715 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:05:14,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:05:14,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1385368131, now seen corresponding path program 2 times [2024-09-20 20:05:14,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:05:14,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928701357] [2024-09-20 20:05:14,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:05:14,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:05:14,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:05:14,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [846433650] [2024-09-20 20:05:14,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 20:05:14,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:05:14,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:05:14,742 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:05:14,745 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 20:05:14,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 20:05:14,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 20:05:14,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 141 conjuncts are in the unsatisfiable core [2024-09-20 20:05:14,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:05:14,967 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 15 treesize of output 1 [2024-09-20 20:05:14,982 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 11 treesize of output 7 [2024-09-20 20:05:15,020 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 11 treesize of output 7 [2024-09-20 20:05:26,883 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 36 treesize of output 13 [2024-09-20 20:05:26,911 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 19 treesize of output 11 [2024-09-20 20:05:27,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2024-09-20 20:05:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 98 proven. 36 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-20 20:05:28,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:05:31,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:05:31,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928701357] [2024-09-20 20:05:31,865 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:05:31,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846433650] [2024-09-20 20:05:31,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846433650] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:05:31,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:05:31,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-20 20:05:31,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484816777] [2024-09-20 20:05:31,866 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:05:31,866 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 20:05:31,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:05:31,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 20:05:31,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=626, Unknown=2, NotChecked=0, Total=702 [2024-09-20 20:05:31,867 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand has 23 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 19 states have internal predecessors, (35), 10 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (11), 7 states have call predecessors, (11), 9 states have call successors, (11) [2024-09-20 20:05:38,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-20 20:05:46,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:05:46,734 INFO L93 Difference]: Finished difference Result 105 states and 113 transitions. [2024-09-20 20:05:46,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-20 20:05:46,734 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 19 states have internal predecessors, (35), 10 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (11), 7 states have call predecessors, (11), 9 states have call successors, (11) Word has length 88 [2024-09-20 20:05:46,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:05:46,735 INFO L225 Difference]: With dead ends: 105 [2024-09-20 20:05:46,735 INFO L226 Difference]: Without dead ends: 101 [2024-09-20 20:05:46,736 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=246, Invalid=1819, Unknown=5, NotChecked=0, Total=2070 [2024-09-20 20:05:46,737 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 30 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2024-09-20 20:05:46,737 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 102 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 599 Invalid, 6 Unknown, 0 Unchecked, 7.6s Time] [2024-09-20 20:05:46,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-09-20 20:05:46,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2024-09-20 20:05:46,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 20 states have call successors, (20), 16 states have call predecessors, (20), 15 states have return successors, (23), 19 states have call predecessors, (23), 17 states have call successors, (23) [2024-09-20 20:05:46,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2024-09-20 20:05:46,801 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 88 [2024-09-20 20:05:46,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:05:46,802 INFO L474 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2024-09-20 20:05:46,802 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 19 states have internal predecessors, (35), 10 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (11), 7 states have call predecessors, (11), 9 states have call successors, (11) [2024-09-20 20:05:46,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:05:46,802 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2024-09-20 20:05:46,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-20 20:05:46,804 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:05:46,804 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:05:46,821 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-20 20:05:47,004 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-20 20:05:47,005 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:05:47,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:05:47,005 INFO L85 PathProgramCache]: Analyzing trace with hash -42363038, now seen corresponding path program 3 times [2024-09-20 20:05:47,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:05:47,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138600042] [2024-09-20 20:05:47,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:05:47,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:05:47,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:05:47,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1065401347] [2024-09-20 20:05:47,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 20:05:47,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:05:47,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:05:47,036 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:05:47,037 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 20:05:47,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-20 20:05:47,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 20:05:47,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 157 conjuncts are in the unsatisfiable core [2024-09-20 20:05:47,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:05:47,270 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 11 treesize of output 7 [2024-09-20 20:05:47,289 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 11 treesize of output 7 [2024-09-20 20:05:47,307 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 11 treesize of output 7 [2024-09-20 20:05:50,706 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 19 treesize of output 11 [2024-09-20 20:05:50,725 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 19 treesize of output 11 [2024-09-20 20:05:51,495 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 72 proven. 43 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2024-09-20 20:05:51,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:05:56,769 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 35 treesize of output 31 [2024-09-20 20:06:15,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:06:15,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138600042] [2024-09-20 20:06:15,123 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:06:15,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065401347] [2024-09-20 20:06:15,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065401347] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:06:15,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:06:15,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-20 20:06:15,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015108935] [2024-09-20 20:06:15,124 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:06:15,124 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-20 20:06:15,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:06:15,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-20 20:06:15,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2024-09-20 20:06:15,125 INFO L87 Difference]: Start difference. First operand 99 states and 108 transitions. Second operand has 16 states, 12 states have (on average 2.5) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-20 20:06:18,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:06:18,099 INFO L93 Difference]: Finished difference Result 123 states and 133 transitions. [2024-09-20 20:06:18,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-20 20:06:18,100 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.5) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 112 [2024-09-20 20:06:18,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:06:18,101 INFO L225 Difference]: With dead ends: 123 [2024-09-20 20:06:18,101 INFO L226 Difference]: Without dead ends: 119 [2024-09-20 20:06:18,101 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 107 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2024-09-20 20:06:18,102 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 23 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 20 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-09-20 20:06:18,102 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 125 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 571 Invalid, 3 Unknown, 0 Unchecked, 2.4s Time] [2024-09-20 20:06:18,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-09-20 20:06:18,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 101. [2024-09-20 20:06:18,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 20 states have call successors, (20), 16 states have call predecessors, (20), 16 states have return successors, (26), 20 states have call predecessors, (26), 17 states have call successors, (26) [2024-09-20 20:06:18,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2024-09-20 20:06:18,160 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 112 [2024-09-20 20:06:18,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:06:18,160 INFO L474 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2024-09-20 20:06:18,160 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.5) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-20 20:06:18,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:06:18,160 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2024-09-20 20:06:18,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-09-20 20:06:18,162 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:06:18,162 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:06:18,175 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-20 20:06:18,362 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:06:18,362 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:06:18,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:06:18,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1115426367, now seen corresponding path program 4 times [2024-09-20 20:06:18,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:06:18,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369289411] [2024-09-20 20:06:18,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:06:18,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:06:18,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:06:18,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1039560523] [2024-09-20 20:06:18,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 20:06:18,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:06:18,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:06:18,402 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:06:18,403 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-20 20:06:18,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 20:06:18,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 20:06:18,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 148 conjuncts are in the unsatisfiable core [2024-09-20 20:06:18,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:06:20,669 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 15 treesize of output 1 [2024-09-20 20:06:20,681 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 33 treesize of output 21 [2024-09-20 20:06:20,690 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 33 treesize of output 21 [2024-09-20 20:06:22,801 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 20:06:22,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2024-09-20 20:06:23,390 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 34 treesize of output 26 [2024-09-20 20:06:23,399 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 37 treesize of output 17 [2024-09-20 20:06:23,758 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 339 proven. 89 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2024-09-20 20:06:23,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:06:30,212 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 20:06:30,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 107 [2024-09-20 20:06:30,223 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 98 treesize of output 90 [2024-09-20 20:06:30,236 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 12 treesize of output 8 [2024-09-20 20:06:32,592 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 20:06:32,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 107 [2024-09-20 20:06:32,603 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 98 treesize of output 90 [2024-09-20 20:06:32,616 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 12 treesize of output 8 [2024-09-20 20:06:34,319 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 20:06:34,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 107 [2024-09-20 20:06:34,330 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 98 treesize of output 90 [2024-09-20 20:06:34,343 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 12 treesize of output 8 [2024-09-20 20:06:36,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:06:36,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369289411] [2024-09-20 20:06:36,848 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:06:36,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039560523] [2024-09-20 20:06:36,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039560523] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:06:36,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:06:36,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-20 20:06:36,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371078576] [2024-09-20 20:06:36,848 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:06:36,849 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-20 20:06:36,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:06:36,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-20 20:06:36,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2024-09-20 20:06:36,850 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand has 24 states, 20 states have (on average 2.5) internal successors, (50), 21 states have internal predecessors, (50), 10 states have call successors, (20), 6 states have call predecessors, (20), 8 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) [2024-09-20 20:06:41,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:06:41,402 INFO L93 Difference]: Finished difference Result 107 states and 117 transitions. [2024-09-20 20:06:41,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 20:06:41,402 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 2.5) internal successors, (50), 21 states have internal predecessors, (50), 10 states have call successors, (20), 6 states have call predecessors, (20), 8 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) Word has length 136 [2024-09-20 20:06:41,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:06:41,403 INFO L225 Difference]: With dead ends: 107 [2024-09-20 20:06:41,403 INFO L226 Difference]: Without dead ends: 103 [2024-09-20 20:06:41,404 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 134 SyntacticMatches, 8 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=287, Invalid=1435, Unknown=0, NotChecked=0, Total=1722 [2024-09-20 20:06:41,405 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 58 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-09-20 20:06:41,405 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 92 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-09-20 20:06:41,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-09-20 20:06:41,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 83. [2024-09-20 20:06:41,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 17 states have call successors, (17), 14 states have call predecessors, (17), 12 states have return successors, (18), 15 states have call predecessors, (18), 15 states have call successors, (18) [2024-09-20 20:06:41,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2024-09-20 20:06:41,485 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 136 [2024-09-20 20:06:41,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:06:41,486 INFO L474 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2024-09-20 20:06:41,486 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 2.5) internal successors, (50), 21 states have internal predecessors, (50), 10 states have call successors, (20), 6 states have call predecessors, (20), 8 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) [2024-09-20 20:06:41,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:06:41,486 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2024-09-20 20:06:41,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-09-20 20:06:41,488 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:06:41,488 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:06:41,506 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-20 20:06:41,689 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-20 20:06:41,689 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:06:41,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:06:41,689 INFO L85 PathProgramCache]: Analyzing trace with hash 344499176, now seen corresponding path program 2 times [2024-09-20 20:06:41,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:06:41,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241870036] [2024-09-20 20:06:41,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:06:41,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:06:41,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:06:41,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [348321519] [2024-09-20 20:06:41,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 20:06:41,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:06:41,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:06:41,716 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:06:41,718 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-20 20:06:41,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 20:06:41,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 20:06:41,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 159 conjuncts are in the unsatisfiable core [2024-09-20 20:06:41,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:06:41,939 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 15 treesize of output 1 [2024-09-20 20:06:41,952 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 11 treesize of output 7 [2024-09-20 20:06:41,981 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 11 treesize of output 7 [2024-09-20 20:07:15,469 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 19 treesize of output 11 [2024-09-20 20:07:15,510 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 36 treesize of output 13 [2024-09-20 20:07:15,540 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 19 treesize of output 11 [2024-09-20 20:07:16,893 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 65 proven. 173 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-09-20 20:07:16,893 INFO L327 TraceCheckSpWp]: Computing backward predicates...