./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-crafted/simple_array_index_value_2.i --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 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/loop-crafted/simple_array_index_value_2.i -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 6dcb150490c6daa5a1cdb1426c8815f073186f609bef3d7e722a6c72be49ca91 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-12 17:55:37,347 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 17:55:37,403 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 17:55:37,408 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 17:55:37,408 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 17:55:37,430 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 17:55:37,433 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 17:55:37,433 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 17:55:37,434 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 17:55:37,435 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 17:55:37,435 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 17:55:37,435 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 17:55:37,435 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 17:55:37,436 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 17:55:37,437 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 17:55:37,437 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 17:55:37,437 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 17:55:37,440 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 17:55:37,440 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 17:55:37,440 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 17:55:37,440 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 17:55:37,441 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 17:55:37,441 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 17:55:37,441 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 17:55:37,441 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 17:55:37,441 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 17:55:37,441 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 17:55:37,441 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 17:55:37,442 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 17:55:37,442 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 17:55:37,442 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 17:55:37,442 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 17:55:37,442 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 17:55:37,442 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 17:55:37,442 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 17:55:37,446 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 17:55:37,447 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 17:55:37,447 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 17:55:37,447 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 17:55:37,447 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 17:55:37,447 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 17:55:37,448 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 17:55:37,448 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6dcb150490c6daa5a1cdb1426c8815f073186f609bef3d7e722a6c72be49ca91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2024-09-12 17:55:37,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 17:55:37,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 17:55:37,715 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 17:55:37,716 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 17:55:37,717 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 17:55:37,718 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-crafted/simple_array_index_value_2.i [2024-09-12 17:55:39,018 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 17:55:39,180 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 17:55:39,182 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-crafted/simple_array_index_value_2.i [2024-09-12 17:55:39,194 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/14621009b/34bef77e5e754e17976833e264aa5101/FLAG0863f9d3f [2024-09-12 17:55:39,208 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/14621009b/34bef77e5e754e17976833e264aa5101 [2024-09-12 17:55:39,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 17:55:39,212 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 17:55:39,214 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 17:55:39,215 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 17:55:39,219 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 17:55:39,221 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 05:55:39" (1/1) ... [2024-09-12 17:55:39,222 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22269282 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 05:55:39, skipping insertion in model container [2024-09-12 17:55:39,222 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 05:55:39" (1/1) ... [2024-09-12 17:55:39,240 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 17:55:39,369 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-crafted/simple_array_index_value_2.i[919,932] [2024-09-12 17:55:39,385 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 17:55:39,396 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 17:55:39,407 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-crafted/simple_array_index_value_2.i[919,932] [2024-09-12 17:55:39,412 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 17:55:39,425 INFO L204 MainTranslator]: Completed translation [2024-09-12 17:55:39,426 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 05:55:39 WrapperNode [2024-09-12 17:55:39,426 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 17:55:39,427 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 17:55:39,428 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 17:55:39,428 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 17:55:39,434 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 05:55:39" (1/1) ... [2024-09-12 17:55:39,440 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 05:55:39" (1/1) ... [2024-09-12 17:55:39,446 INFO L138 Inliner]: procedures = 17, calls = 12, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 17:55:39,446 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 17:55:39,447 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 17:55:39,447 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 17:55:39,448 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 17:55:39,456 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 05:55:39" (1/1) ... [2024-09-12 17:55:39,456 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 05:55:39" (1/1) ... [2024-09-12 17:55:39,457 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 05:55:39" (1/1) ... [2024-09-12 17:55:39,470 INFO L175 MemorySlicer]: Split 4 memory accesses to 2 slices as follows [2, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-09-12 17:55:39,471 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 05:55:39" (1/1) ... [2024-09-12 17:55:39,471 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 05:55:39" (1/1) ... [2024-09-12 17:55:39,485 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 05:55:39" (1/1) ... [2024-09-12 17:55:39,488 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 05:55:39" (1/1) ... [2024-09-12 17:55:39,488 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 05:55:39" (1/1) ... [2024-09-12 17:55:39,489 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 05:55:39" (1/1) ... [2024-09-12 17:55:39,495 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 17:55:39,496 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 17:55:39,496 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 17:55:39,497 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 17:55:39,497 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 05:55:39" (1/1) ... [2024-09-12 17:55:39,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 17:55:39,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 17:55:39,525 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) [2024-09-12 17:55:39,527 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 [2024-09-12 17:55:39,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 17:55:39,568 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-12 17:55:39,568 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-12 17:55:39,568 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 17:55:39,568 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 17:55:39,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 17:55:39,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-12 17:55:39,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-12 17:55:39,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-12 17:55:39,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-12 17:55:39,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 17:55:39,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 17:55:39,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 17:55:39,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 17:55:39,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-12 17:55:39,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-12 17:55:39,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 17:55:39,571 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 17:55:39,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-12 17:55:39,629 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 17:55:39,630 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 17:55:39,746 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-09-12 17:55:39,746 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 17:55:39,777 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 17:55:39,778 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-12 17:55:39,778 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 05:55:39 BoogieIcfgContainer [2024-09-12 17:55:39,778 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 17:55:39,780 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 17:55:39,781 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 17:55:39,784 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 17:55:39,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 05:55:39" (1/3) ... [2024-09-12 17:55:39,785 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7afbefee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 05:55:39, skipping insertion in model container [2024-09-12 17:55:39,785 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 05:55:39" (2/3) ... [2024-09-12 17:55:39,785 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7afbefee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 05:55:39, skipping insertion in model container [2024-09-12 17:55:39,786 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 05:55:39" (3/3) ... [2024-09-12 17:55:39,786 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_2.i [2024-09-12 17:55:39,800 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 17:55:39,800 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 17:55:39,853 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 17:55:39,860 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;@5a2d8cd8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 17:55:39,861 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 17:55:39,864 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 17:55:39,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-12 17:55:39,870 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 17:55:39,871 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 17:55:39,871 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 17:55:39,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 17:55:39,877 INFO L85 PathProgramCache]: Analyzing trace with hash 302093044, now seen corresponding path program 1 times [2024-09-12 17:55:39,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 17:55:39,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142193222] [2024-09-12 17:55:39,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 17:55:39,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 17:55:39,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:40,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 17:55:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 17:55:40,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 17:55:40,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142193222] [2024-09-12 17:55:40,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142193222] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 17:55:40,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 17:55:40,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-12 17:55:40,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978907321] [2024-09-12 17:55:40,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 17:55:40,048 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-12 17:55:40,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 17:55:40,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-12 17:55:40,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 17:55:40,071 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 17:55:40,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 17:55:40,099 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2024-09-12 17:55:40,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-12 17:55:40,102 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-09-12 17:55:40,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 17:55:40,107 INFO L225 Difference]: With dead ends: 47 [2024-09-12 17:55:40,107 INFO L226 Difference]: Without dead ends: 22 [2024-09-12 17:55:40,110 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 17:55:40,112 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 17:55:40,114 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 17:55:40,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-12 17:55:40,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-09-12 17:55:40,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 17:55:40,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2024-09-12 17:55:40,146 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 12 [2024-09-12 17:55:40,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 17:55:40,147 INFO L474 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2024-09-12 17:55:40,147 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 17:55:40,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 17:55:40,148 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2024-09-12 17:55:40,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-12 17:55:40,149 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 17:55:40,149 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 17:55:40,149 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 17:55:40,150 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 17:55:40,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 17:55:40,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1791998188, now seen corresponding path program 1 times [2024-09-12 17:55:40,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 17:55:40,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331774664] [2024-09-12 17:55:40,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 17:55:40,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 17:55:40,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:40,269 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 17:55:40,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:40,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 17:55:40,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 17:55:40,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331774664] [2024-09-12 17:55:40,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331774664] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 17:55:40,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 17:55:40,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-12 17:55:40,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045711277] [2024-09-12 17:55:40,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 17:55:40,280 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-12 17:55:40,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 17:55:40,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-12 17:55:40,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 17:55:40,281 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 17:55:40,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 17:55:40,315 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2024-09-12 17:55:40,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-12 17:55:40,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-09-12 17:55:40,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 17:55:40,317 INFO L225 Difference]: With dead ends: 38 [2024-09-12 17:55:40,317 INFO L226 Difference]: Without dead ends: 28 [2024-09-12 17:55:40,318 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 17:55:40,318 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 17:55:40,319 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 33 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 17:55:40,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-09-12 17:55:40,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2024-09-12 17:55:40,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 17:55:40,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2024-09-12 17:55:40,334 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 12 [2024-09-12 17:55:40,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 17:55:40,334 INFO L474 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2024-09-12 17:55:40,334 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 17:55:40,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 17:55:40,334 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2024-09-12 17:55:40,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-12 17:55:40,335 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 17:55:40,335 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 17:55:40,335 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-12 17:55:40,336 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 17:55:40,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 17:55:40,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1348305993, now seen corresponding path program 1 times [2024-09-12 17:55:40,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 17:55:40,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607635634] [2024-09-12 17:55:40,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 17:55:40,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 17:55:40,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:40,467 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 17:55:40,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:40,471 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 17:55:40,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:40,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 17:55:40,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 17:55:40,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607635634] [2024-09-12 17:55:40,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607635634] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 17:55:40,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017155183] [2024-09-12 17:55:40,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 17:55:40,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 17:55:40,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 17:55:40,490 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) [2024-09-12 17:55:40,492 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 17:55:40,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:40,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-12 17:55:40,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 17:55:40,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 17:55:40,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 17:55:40,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 17:55:40,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017155183] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 17:55:40,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 17:55:40,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-09-12 17:55:40,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784019482] [2024-09-12 17:55:40,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 17:55:40,634 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-12 17:55:40,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 17:55:40,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-12 17:55:40,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-09-12 17:55:40,635 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 17:55:40,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 17:55:40,739 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2024-09-12 17:55:40,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 17:55:40,739 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 19 [2024-09-12 17:55:40,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 17:55:40,742 INFO L225 Difference]: With dead ends: 52 [2024-09-12 17:55:40,742 INFO L226 Difference]: Without dead ends: 42 [2024-09-12 17:55:40,742 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2024-09-12 17:55:40,744 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 17:55:40,744 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 82 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 17:55:40,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-12 17:55:40,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2024-09-12 17:55:40,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-12 17:55:40,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2024-09-12 17:55:40,759 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 19 [2024-09-12 17:55:40,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 17:55:40,759 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2024-09-12 17:55:40,760 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 17:55:40,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 17:55:40,760 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2024-09-12 17:55:40,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-12 17:55:40,761 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 17:55:40,761 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 17:55:40,773 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 17:55:40,962 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 17:55:40,962 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 17:55:40,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 17:55:40,963 INFO L85 PathProgramCache]: Analyzing trace with hash 142257068, now seen corresponding path program 2 times [2024-09-12 17:55:40,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 17:55:40,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440645538] [2024-09-12 17:55:40,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 17:55:40,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 17:55:40,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:41,193 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 17:55:41,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:41,196 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 17:55:41,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:41,207 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-12 17:55:41,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:41,214 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-12 17:55:41,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:41,223 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 17:55:41,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 17:55:41,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 17:55:41,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440645538] [2024-09-12 17:55:41,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440645538] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 17:55:41,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339530707] [2024-09-12 17:55:41,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 17:55:41,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 17:55:41,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 17:55:41,230 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) [2024-09-12 17:55:41,231 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 17:55:41,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 17:55:41,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 17:55:41,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-12 17:55:41,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 17:55:41,332 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 17:55:41,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 17:55:41,454 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 17:55:41,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339530707] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 17:55:41,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 17:55:41,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-09-12 17:55:41,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125482261] [2024-09-12 17:55:41,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 17:55:41,458 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-12 17:55:41,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 17:55:41,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-12 17:55:41,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2024-09-12 17:55:41,459 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-12 17:55:41,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 17:55:41,831 INFO L93 Difference]: Finished difference Result 88 states and 113 transitions. [2024-09-12 17:55:41,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-12 17:55:41,832 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 40 [2024-09-12 17:55:41,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 17:55:41,834 INFO L225 Difference]: With dead ends: 88 [2024-09-12 17:55:41,835 INFO L226 Difference]: Without dead ends: 78 [2024-09-12 17:55:41,835 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2024-09-12 17:55:41,836 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 39 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 17:55:41,836 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 160 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 17:55:41,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-09-12 17:55:41,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 50. [2024-09-12 17:55:41,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-12 17:55:41,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2024-09-12 17:55:41,849 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 40 [2024-09-12 17:55:41,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 17:55:41,850 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2024-09-12 17:55:41,850 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-12 17:55:41,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 17:55:41,851 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2024-09-12 17:55:41,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-12 17:55:41,855 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 17:55:41,855 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 17:55:41,869 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-12 17:55:42,056 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 17:55:42,056 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 17:55:42,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 17:55:42,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1112716340, now seen corresponding path program 3 times [2024-09-12 17:55:42,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 17:55:42,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052167751] [2024-09-12 17:55:42,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 17:55:42,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 17:55:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:42,441 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 17:55:42,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:42,449 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 17:55:42,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:42,456 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-12 17:55:42,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:42,464 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-12 17:55:42,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:42,472 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 17:55:42,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:42,477 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-12 17:55:42,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:42,480 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-12 17:55:42,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:42,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-12 17:55:42,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:42,496 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-12 17:55:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:42,502 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 17:55:42,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:42,508 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-12 17:55:42,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:42,516 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 17:55:42,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 17:55:42,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052167751] [2024-09-12 17:55:42,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052167751] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 17:55:42,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154875700] [2024-09-12 17:55:42,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 17:55:42,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 17:55:42,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 17:55:42,519 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) [2024-09-12 17:55:42,521 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 17:55:52,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-09-12 17:55:52,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 17:55:52,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-12 17:55:52,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 17:55:52,339 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 17:55:52,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 17:55:52,664 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 17:55:52,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154875700] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 17:55:52,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 17:55:52,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-09-12 17:55:52,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729319260] [2024-09-12 17:55:52,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 17:55:52,666 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-12 17:55:52,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 17:55:52,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-12 17:55:52,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2024-09-12 17:55:52,667 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 22 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-12 17:55:55,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 17:55:55,529 INFO L93 Difference]: Finished difference Result 160 states and 215 transitions. [2024-09-12 17:55:55,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-12 17:55:55,529 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 22 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 82 [2024-09-12 17:55:55,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 17:55:55,531 INFO L225 Difference]: With dead ends: 160 [2024-09-12 17:55:55,531 INFO L226 Difference]: Without dead ends: 150 [2024-09-12 17:55:55,532 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=440, Invalid=750, Unknown=0, NotChecked=0, Total=1190 [2024-09-12 17:55:55,532 INFO L434 NwaCegarLoop]: 58 mSDtfsCounter, 96 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-12 17:55:55,533 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 586 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-12 17:55:55,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-09-12 17:55:55,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 86. [2024-09-12 17:55:55,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 25 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-12 17:55:55,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2024-09-12 17:55:55,556 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 82 [2024-09-12 17:55:55,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 17:55:55,559 INFO L474 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2024-09-12 17:55:55,559 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 22 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-12 17:55:55,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 17:55:55,559 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2024-09-12 17:55:55,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2024-09-12 17:55:55,564 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 17:55:55,564 INFO L216 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 17:55:55,579 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-12 17:55:55,768 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 17:55:55,769 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 17:55:55,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 17:55:55,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1141500916, now seen corresponding path program 4 times [2024-09-12 17:55:55,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 17:55:55,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919866375] [2024-09-12 17:55:55,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 17:55:55,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 17:55:55,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:56,553 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 17:55:56,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:56,555 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 17:55:56,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:56,563 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-12 17:55:56,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:56,565 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-12 17:55:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:56,569 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 17:55:56,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:56,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-12 17:55:56,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:56,577 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-12 17:55:56,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:56,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-12 17:55:56,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:56,583 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-12 17:55:56,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:56,587 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 17:55:56,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:56,591 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-12 17:55:56,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:56,598 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-12 17:55:56,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:56,600 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-12 17:55:56,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:56,603 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-12 17:55:56,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:56,606 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-12 17:55:56,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:56,609 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2024-09-12 17:55:56,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:56,611 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-12 17:55:56,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:56,614 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2024-09-12 17:55:56,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:56,617 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2024-09-12 17:55:56,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:56,619 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2024-09-12 17:55:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:56,622 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2024-09-12 17:55:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:56,625 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2024-09-12 17:55:56,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:56,628 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2024-09-12 17:55:56,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:56,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1639 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2024-09-12 17:55:56,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 17:55:56,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919866375] [2024-09-12 17:55:56,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919866375] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 17:55:56,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476750924] [2024-09-12 17:55:56,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 17:55:56,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 17:55:56,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 17:55:56,634 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) [2024-09-12 17:55:56,635 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 17:55:56,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 17:55:56,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 17:55:56,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 191 conjuncts are in the unsatisfiable core [2024-09-12 17:55:56,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 17:55:56,866 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 [2024-09-12 17:55:57,211 INFO L349 Elim1Store]: treesize reduction 48, result has 47.3 percent of original size [2024-09-12 17:55:57,212 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 3 case distinctions, treesize of input 42 treesize of output 53 [2024-09-12 17:55:57,497 INFO L349 Elim1Store]: treesize reduction 48, result has 47.3 percent of original size [2024-09-12 17:55:57,497 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 3 case distinctions, treesize of input 42 treesize of output 53 [2024-09-12 17:55:57,687 INFO L349 Elim1Store]: treesize reduction 48, result has 47.3 percent of original size [2024-09-12 17:55:57,687 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 3 case distinctions, treesize of input 42 treesize of output 53 [2024-09-12 17:55:57,934 INFO L349 Elim1Store]: treesize reduction 48, result has 47.3 percent of original size [2024-09-12 17:55:57,935 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 3 case distinctions, treesize of input 42 treesize of output 53 [2024-09-12 17:55:58,154 INFO L349 Elim1Store]: treesize reduction 48, result has 47.3 percent of original size [2024-09-12 17:55:58,154 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 3 case distinctions, treesize of input 42 treesize of output 53 [2024-09-12 17:55:58,313 INFO L349 Elim1Store]: treesize reduction 48, result has 47.3 percent of original size [2024-09-12 17:55:58,313 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 3 case distinctions, treesize of input 42 treesize of output 53 [2024-09-12 17:55:58,635 INFO L349 Elim1Store]: treesize reduction 48, result has 47.3 percent of original size [2024-09-12 17:55:58,635 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 3 case distinctions, treesize of input 42 treesize of output 53 [2024-09-12 17:55:58,817 INFO L349 Elim1Store]: treesize reduction 48, result has 47.3 percent of original size [2024-09-12 17:55:58,817 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 3 case distinctions, treesize of input 42 treesize of output 53 [2024-09-12 17:55:59,259 INFO L349 Elim1Store]: treesize reduction 48, result has 47.3 percent of original size [2024-09-12 17:55:59,259 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 3 case distinctions, treesize of input 42 treesize of output 53 [2024-09-12 17:55:59,589 INFO L349 Elim1Store]: treesize reduction 48, result has 47.3 percent of original size [2024-09-12 17:55:59,590 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 3 case distinctions, treesize of input 42 treesize of output 53 [2024-09-12 17:55:59,721 INFO L349 Elim1Store]: treesize reduction 48, result has 47.3 percent of original size [2024-09-12 17:55:59,722 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 3 case distinctions, treesize of input 42 treesize of output 53 [2024-09-12 17:56:00,061 INFO L349 Elim1Store]: treesize reduction 48, result has 47.3 percent of original size [2024-09-12 17:56:00,061 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 3 case distinctions, treesize of input 42 treesize of output 53 [2024-09-12 17:56:00,344 INFO L349 Elim1Store]: treesize reduction 48, result has 47.3 percent of original size [2024-09-12 17:56:00,345 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 3 case distinctions, treesize of input 42 treesize of output 53 [2024-09-12 17:56:00,490 INFO L349 Elim1Store]: treesize reduction 48, result has 47.3 percent of original size [2024-09-12 17:56:00,490 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 3 case distinctions, treesize of input 42 treesize of output 53 [2024-09-12 17:56:00,637 INFO L349 Elim1Store]: treesize reduction 48, result has 47.3 percent of original size [2024-09-12 17:56:00,638 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 3 case distinctions, treesize of input 42 treesize of output 53 [2024-09-12 17:56:01,058 INFO L349 Elim1Store]: treesize reduction 48, result has 47.3 percent of original size [2024-09-12 17:56:01,059 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 3 case distinctions, treesize of input 42 treesize of output 53 [2024-09-12 17:56:01,354 INFO L349 Elim1Store]: treesize reduction 48, result has 47.3 percent of original size [2024-09-12 17:56:01,355 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 3 case distinctions, treesize of input 42 treesize of output 53 [2024-09-12 17:56:01,543 INFO L349 Elim1Store]: treesize reduction 48, result has 47.3 percent of original size [2024-09-12 17:56:01,543 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 3 case distinctions, treesize of input 42 treesize of output 53 [2024-09-12 17:56:01,890 INFO L349 Elim1Store]: treesize reduction 48, result has 47.3 percent of original size [2024-09-12 17:56:01,891 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 3 case distinctions, treesize of input 42 treesize of output 53 [2024-09-12 17:56:02,029 INFO L349 Elim1Store]: treesize reduction 48, result has 47.3 percent of original size [2024-09-12 17:56:02,029 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 3 case distinctions, treesize of input 42 treesize of output 53 [2024-09-12 17:56:02,150 INFO L349 Elim1Store]: treesize reduction 48, result has 47.3 percent of original size [2024-09-12 17:56:02,151 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 3 case distinctions, treesize of input 42 treesize of output 53 [2024-09-12 17:56:02,237 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 17 treesize of output 9 [2024-09-12 17:56:02,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1639 backedges. 84 proven. 64 refuted. 0 times theorem prover too weak. 1491 trivial. 0 not checked. [2024-09-12 17:56:02,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 17:56:06,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476750924] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 17:56:06,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 17:56:06,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 16] total 38 [2024-09-12 17:56:06,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728459228] [2024-09-12 17:56:06,580 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 17:56:06,580 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-12 17:56:06,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 17:56:06,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-12 17:56:06,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1751, Unknown=1, NotChecked=0, Total=1892 [2024-09-12 17:56:06,582 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 38 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 34 states have internal predecessors, (69), 26 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (25), 25 states have call predecessors, (25), 24 states have call successors, (25) [2024-09-12 17:56:09,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 17:56:09,473 INFO L93 Difference]: Finished difference Result 180 states and 228 transitions. [2024-09-12 17:56:09,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-09-12 17:56:09,474 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 34 states have internal predecessors, (69), 26 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (25), 25 states have call predecessors, (25), 24 states have call successors, (25) Word has length 166 [2024-09-12 17:56:09,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 17:56:09,476 INFO L225 Difference]: With dead ends: 180 [2024-09-12 17:56:09,476 INFO L226 Difference]: Without dead ends: 170 [2024-09-12 17:56:09,478 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 171 SyntacticMatches, 32 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1731 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=667, Invalid=7522, Unknown=1, NotChecked=0, Total=8190 [2024-09-12 17:56:09,478 INFO L434 NwaCegarLoop]: 57 mSDtfsCounter, 118 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 4348 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 4536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 4348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-09-12 17:56:09,479 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 798 Invalid, 4536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 4348 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-09-12 17:56:09,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-09-12 17:56:09,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 102. [2024-09-12 17:56:09,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 69 states have internal predecessors, (70), 28 states have call successors, (28), 6 states have call predecessors, (28), 5 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2024-09-12 17:56:09,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 125 transitions. [2024-09-12 17:56:09,510 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 125 transitions. Word has length 166 [2024-09-12 17:56:09,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 17:56:09,510 INFO L474 AbstractCegarLoop]: Abstraction has 102 states and 125 transitions. [2024-09-12 17:56:09,510 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 34 states have internal predecessors, (69), 26 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (25), 25 states have call predecessors, (25), 24 states have call successors, (25) [2024-09-12 17:56:09,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 17:56:09,511 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 125 transitions. [2024-09-12 17:56:09,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2024-09-12 17:56:09,515 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 17:56:09,515 INFO L216 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 17:56:09,529 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-12 17:56:09,719 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 [2024-09-12 17:56:09,720 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 17:56:09,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 17:56:09,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1553173923, now seen corresponding path program 1 times [2024-09-12 17:56:09,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 17:56:09,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61232100] [2024-09-12 17:56:09,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 17:56:09,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 17:56:09,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:10,424 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 17:56:10,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:10,427 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 17:56:10,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:10,430 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-12 17:56:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:10,432 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-12 17:56:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:10,434 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 17:56:10,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:10,436 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-12 17:56:10,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:10,438 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-12 17:56:10,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:10,440 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-12 17:56:10,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:10,442 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-12 17:56:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:10,444 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 17:56:10,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:10,446 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-12 17:56:10,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:10,448 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-12 17:56:10,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:10,451 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-12 17:56:10,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:10,453 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-12 17:56:10,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:10,455 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-12 17:56:10,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:10,457 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2024-09-12 17:56:10,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:10,460 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-12 17:56:10,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:10,462 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2024-09-12 17:56:10,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:10,464 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2024-09-12 17:56:10,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:10,466 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2024-09-12 17:56:10,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:10,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2024-09-12 17:56:10,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:10,471 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2024-09-12 17:56:10,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:10,473 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2024-09-12 17:56:10,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:10,476 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2024-09-12 17:56:10,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:10,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2024-09-12 17:56:10,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:10,480 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2024-09-12 17:56:10,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1960 backedges. 2 proven. 852 refuted. 0 times theorem prover too weak. 1106 trivial. 0 not checked. [2024-09-12 17:56:10,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 17:56:10,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61232100] [2024-09-12 17:56:10,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61232100] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 17:56:10,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105143280] [2024-09-12 17:56:10,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 17:56:10,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 17:56:10,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 17:56:10,485 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) [2024-09-12 17:56:10,486 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 17:56:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:10,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 198 conjuncts are in the unsatisfiable core [2024-09-12 17:56:10,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 17:56:10,679 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 19 treesize of output 1 [2024-09-12 17:56:10,921 INFO L349 Elim1Store]: treesize reduction 54, result has 47.6 percent of original size [2024-09-12 17:56:10,922 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 3 case distinctions, treesize of input 46 treesize of output 59 [2024-09-12 17:56:11,273 INFO L349 Elim1Store]: treesize reduction 54, result has 47.6 percent of original size [2024-09-12 17:56:11,273 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 3 case distinctions, treesize of input 46 treesize of output 59 [2024-09-12 17:56:11,645 INFO L349 Elim1Store]: treesize reduction 54, result has 47.6 percent of original size [2024-09-12 17:56:11,646 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 3 case distinctions, treesize of input 46 treesize of output 59 [2024-09-12 17:56:11,990 INFO L349 Elim1Store]: treesize reduction 54, result has 47.6 percent of original size [2024-09-12 17:56:11,990 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 3 case distinctions, treesize of input 46 treesize of output 59 [2024-09-12 17:56:12,139 INFO L349 Elim1Store]: treesize reduction 54, result has 47.6 percent of original size [2024-09-12 17:56:12,139 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 3 case distinctions, treesize of input 46 treesize of output 59 [2024-09-12 17:56:12,242 INFO L349 Elim1Store]: treesize reduction 54, result has 47.6 percent of original size [2024-09-12 17:56:12,243 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 3 case distinctions, treesize of input 46 treesize of output 59 [2024-09-12 17:56:12,471 INFO L349 Elim1Store]: treesize reduction 54, result has 47.6 percent of original size [2024-09-12 17:56:12,471 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 3 case distinctions, treesize of input 46 treesize of output 59 [2024-09-12 17:56:12,629 INFO L349 Elim1Store]: treesize reduction 54, result has 47.6 percent of original size [2024-09-12 17:56:12,629 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 3 case distinctions, treesize of input 46 treesize of output 59 [2024-09-12 17:56:13,015 INFO L349 Elim1Store]: treesize reduction 54, result has 47.6 percent of original size [2024-09-12 17:56:13,016 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 3 case distinctions, treesize of input 46 treesize of output 59 [2024-09-12 17:56:13,210 INFO L349 Elim1Store]: treesize reduction 54, result has 47.6 percent of original size [2024-09-12 17:56:13,210 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 3 case distinctions, treesize of input 46 treesize of output 59 [2024-09-12 17:56:13,538 INFO L349 Elim1Store]: treesize reduction 54, result has 47.6 percent of original size [2024-09-12 17:56:13,538 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 3 case distinctions, treesize of input 46 treesize of output 59 [2024-09-12 17:56:13,764 INFO L349 Elim1Store]: treesize reduction 54, result has 47.6 percent of original size [2024-09-12 17:56:13,765 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 3 case distinctions, treesize of input 46 treesize of output 59 [2024-09-12 17:56:14,057 INFO L349 Elim1Store]: treesize reduction 54, result has 47.6 percent of original size [2024-09-12 17:56:14,057 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 3 case distinctions, treesize of input 46 treesize of output 59 [2024-09-12 17:56:14,416 INFO L349 Elim1Store]: treesize reduction 54, result has 47.6 percent of original size [2024-09-12 17:56:14,416 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 3 case distinctions, treesize of input 46 treesize of output 59 [2024-09-12 17:56:14,536 INFO L349 Elim1Store]: treesize reduction 54, result has 47.6 percent of original size [2024-09-12 17:56:14,536 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 3 case distinctions, treesize of input 46 treesize of output 59 [2024-09-12 17:56:14,848 INFO L349 Elim1Store]: treesize reduction 54, result has 47.6 percent of original size [2024-09-12 17:56:14,848 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 3 case distinctions, treesize of input 46 treesize of output 59 [2024-09-12 17:56:15,311 INFO L349 Elim1Store]: treesize reduction 54, result has 47.6 percent of original size [2024-09-12 17:56:15,311 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 3 case distinctions, treesize of input 46 treesize of output 59 [2024-09-12 17:56:15,417 INFO L349 Elim1Store]: treesize reduction 54, result has 47.6 percent of original size [2024-09-12 17:56:15,418 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 3 case distinctions, treesize of input 46 treesize of output 59 [2024-09-12 17:56:15,909 INFO L349 Elim1Store]: treesize reduction 54, result has 47.6 percent of original size [2024-09-12 17:56:15,909 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 3 case distinctions, treesize of input 46 treesize of output 59 [2024-09-12 17:56:16,136 INFO L349 Elim1Store]: treesize reduction 54, result has 47.6 percent of original size [2024-09-12 17:56:16,136 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 3 case distinctions, treesize of input 46 treesize of output 59 [2024-09-12 17:56:16,456 INFO L349 Elim1Store]: treesize reduction 54, result has 47.6 percent of original size [2024-09-12 17:56:16,456 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 3 case distinctions, treesize of input 46 treesize of output 59 [2024-09-12 17:56:16,695 INFO L349 Elim1Store]: treesize reduction 54, result has 47.6 percent of original size [2024-09-12 17:56:16,695 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 3 case distinctions, treesize of input 46 treesize of output 59 [2024-09-12 17:56:17,166 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 21 treesize of output 9 [2024-09-12 17:56:17,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1960 backedges. 179 proven. 141 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2024-09-12 17:56:17,236 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 17:56:25,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105143280] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 17:56:25,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 17:56:25,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 18] total 41 [2024-09-12 17:56:25,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618484430] [2024-09-12 17:56:25,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 17:56:25,632 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-12 17:56:25,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 17:56:25,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-12 17:56:25,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1916, Unknown=2, NotChecked=0, Total=2070 [2024-09-12 17:56:25,633 INFO L87 Difference]: Start difference. First operand 102 states and 125 transitions. Second operand has 41 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 38 states have internal predecessors, (82), 29 states have call successors, (31), 4 states have call predecessors, (31), 4 states have return successors, (29), 29 states have call predecessors, (29), 28 states have call successors, (29) [2024-09-12 17:56:29,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-12 17:56:33,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 17:56:33,073 INFO L93 Difference]: Finished difference Result 206 states and 256 transitions. [2024-09-12 17:56:33,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-09-12 17:56:33,073 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 38 states have internal predecessors, (82), 29 states have call successors, (31), 4 states have call predecessors, (31), 4 states have return successors, (29), 29 states have call predecessors, (29), 28 states have call successors, (29) Word has length 187 [2024-09-12 17:56:33,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 17:56:33,077 INFO L225 Difference]: With dead ends: 206 [2024-09-12 17:56:33,077 INFO L226 Difference]: Without dead ends: 190 [2024-09-12 17:56:33,079 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 198 SyntacticMatches, 40 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1958 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=700, Invalid=8228, Unknown=2, NotChecked=0, Total=8930 [2024-09-12 17:56:33,081 INFO L434 NwaCegarLoop]: 64 mSDtfsCounter, 141 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 4702 mSolverCounterSat, 171 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 4874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 4702 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2024-09-12 17:56:33,081 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 1185 Invalid, 4874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 4702 Invalid, 1 Unknown, 0 Unchecked, 6.0s Time] [2024-09-12 17:56:33,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-09-12 17:56:33,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 119. [2024-09-12 17:56:33,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 80 states have (on average 1.025) internal successors, (82), 81 states have internal predecessors, (82), 31 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-12 17:56:33,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 143 transitions. [2024-09-12 17:56:33,103 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 143 transitions. Word has length 187 [2024-09-12 17:56:33,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 17:56:33,103 INFO L474 AbstractCegarLoop]: Abstraction has 119 states and 143 transitions. [2024-09-12 17:56:33,104 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 38 states have internal predecessors, (82), 29 states have call successors, (31), 4 states have call predecessors, (31), 4 states have return successors, (29), 29 states have call predecessors, (29), 28 states have call successors, (29) [2024-09-12 17:56:33,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 17:56:33,104 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 143 transitions. [2024-09-12 17:56:33,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2024-09-12 17:56:33,106 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 17:56:33,106 INFO L216 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 17:56:33,119 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-12 17:56:33,306 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 [2024-09-12 17:56:33,307 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 17:56:33,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 17:56:33,307 INFO L85 PathProgramCache]: Analyzing trace with hash 772297452, now seen corresponding path program 2 times [2024-09-12 17:56:33,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 17:56:33,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708824579] [2024-09-12 17:56:33,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 17:56:33,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 17:56:33,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:34,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 17:56:34,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:34,157 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 17:56:34,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:34,159 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-12 17:56:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:34,161 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-12 17:56:34,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:34,164 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 17:56:34,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:34,166 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-12 17:56:34,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:34,168 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-12 17:56:34,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:34,169 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-12 17:56:34,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:34,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-12 17:56:34,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:34,175 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 17:56:34,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:34,176 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-12 17:56:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:34,179 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-12 17:56:34,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:34,181 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-12 17:56:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:34,183 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-12 17:56:34,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:34,186 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-12 17:56:34,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:34,188 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2024-09-12 17:56:34,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:34,190 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-12 17:56:34,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:34,191 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2024-09-12 17:56:34,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:34,195 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2024-09-12 17:56:34,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:34,198 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2024-09-12 17:56:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:34,200 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2024-09-12 17:56:34,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:34,203 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2024-09-12 17:56:34,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:34,206 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2024-09-12 17:56:34,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:34,209 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2024-09-12 17:56:34,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:34,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2024-09-12 17:56:34,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:34,214 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2024-09-12 17:56:34,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:34,216 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2024-09-12 17:56:34,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:34,218 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2024-09-12 17:56:34,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:34,220 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2024-09-12 17:56:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:56:34,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 4 proven. 1001 refuted. 0 times theorem prover too weak. 1311 trivial. 0 not checked. [2024-09-12 17:56:34,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 17:56:34,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708824579] [2024-09-12 17:56:34,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708824579] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 17:56:34,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925692574] [2024-09-12 17:56:34,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 17:56:34,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 17:56:34,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 17:56:34,224 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) [2024-09-12 17:56:34,225 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 17:56:34,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 17:56:34,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 17:56:34,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 232 conjuncts are in the unsatisfiable core [2024-09-12 17:56:34,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 17:56:34,756 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 19 treesize of output 1 [2024-09-12 17:56:34,981 INFO L349 Elim1Store]: treesize reduction 39, result has 32.8 percent of original size [2024-09-12 17:56:34,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 39 [2024-09-12 17:56:35,306 INFO L349 Elim1Store]: treesize reduction 104, result has 27.3 percent of original size [2024-09-12 17:56:35,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 64 treesize of output 77 [2024-09-12 17:56:37,310 INFO L349 Elim1Store]: treesize reduction 1316, result has 21.5 percent of original size [2024-09-12 17:56:37,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 6 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 110 case distinctions, treesize of input 190 treesize of output 467 [2024-09-12 17:57:48,480 WARN L293 SmtUtils]: Spent 25.24s on a formula simplification. DAG size of input: 1089 DAG size of output: 1056 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)