./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.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 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.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 07d2bb25a1c8c4ef92611e8b25e211f661495bf054d1380ec62ffea892b45c2f --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-17 19:27:00,686 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-17 19:27:00,739 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-17 19:27:00,743 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-17 19:27:00,743 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-17 19:27:00,770 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-17 19:27:00,771 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-17 19:27:00,771 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-17 19:27:00,772 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-17 19:27:00,773 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-17 19:27:00,773 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-17 19:27:00,774 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-17 19:27:00,774 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-17 19:27:00,774 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-17 19:27:00,775 INFO L153 SettingsManager]: * Use SBE=true [2024-09-17 19:27:00,775 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-17 19:27:00,775 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-17 19:27:00,775 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-17 19:27:00,775 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-17 19:27:00,776 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-17 19:27:00,776 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-17 19:27:00,780 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-17 19:27:00,780 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-17 19:27:00,780 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-17 19:27:00,780 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-17 19:27:00,781 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-17 19:27:00,781 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-17 19:27:00,781 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-17 19:27:00,781 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-17 19:27:00,781 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-17 19:27:00,782 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-17 19:27:00,782 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-17 19:27:00,782 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 19:27:00,782 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-17 19:27:00,782 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-17 19:27:00,782 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-17 19:27:00,782 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-17 19:27:00,783 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-17 19:27:00,783 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-17 19:27:00,783 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-17 19:27:00,783 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-17 19:27:00,784 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-17 19:27:00,784 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07d2bb25a1c8c4ef92611e8b25e211f661495bf054d1380ec62ffea892b45c2f Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-17 19:27:00,972 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-17 19:27:00,992 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-17 19:27:00,994 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-17 19:27:00,996 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-17 19:27:00,996 INFO L274 PluginConnector]: CDTParser initialized [2024-09-17 19:27:00,998 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i [2024-09-17 19:27:02,309 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-17 19:27:02,437 INFO L384 CDTParser]: Found 1 translation units. [2024-09-17 19:27:02,438 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i [2024-09-17 19:27:02,443 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/18f0a3335/c16b2f7b464d459b98fa8ca960a3c86e/FLAGe31620e4e [2024-09-17 19:27:02,453 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/18f0a3335/c16b2f7b464d459b98fa8ca960a3c86e [2024-09-17 19:27:02,454 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-17 19:27:02,455 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-17 19:27:02,456 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-17 19:27:02,456 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-17 19:27:02,460 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-17 19:27:02,460 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 07:27:02" (1/1) ... [2024-09-17 19:27:02,461 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43305ddc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:27:02, skipping insertion in model container [2024-09-17 19:27:02,461 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 07:27:02" (1/1) ... [2024-09-17 19:27:02,477 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-17 19:27:02,612 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i[1567,1580] [2024-09-17 19:27:02,625 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 19:27:02,646 INFO L200 MainTranslator]: Completed pre-run [2024-09-17 19:27:02,654 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i[1567,1580] [2024-09-17 19:27:02,660 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 19:27:02,671 INFO L204 MainTranslator]: Completed translation [2024-09-17 19:27:02,671 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:27:02 WrapperNode [2024-09-17 19:27:02,671 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-17 19:27:02,672 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-17 19:27:02,672 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-17 19:27:02,672 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-17 19:27:02,677 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:27:02" (1/1) ... [2024-09-17 19:27:02,687 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:27:02" (1/1) ... [2024-09-17 19:27:02,692 INFO L138 Inliner]: procedures = 19, calls = 59, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-17 19:27:02,692 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-17 19:27:02,693 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-17 19:27:02,693 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-17 19:27:02,693 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-17 19:27:02,700 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:27:02" (1/1) ... [2024-09-17 19:27:02,700 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:27:02" (1/1) ... [2024-09-17 19:27:02,701 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:27:02" (1/1) ... [2024-09-17 19:27:02,716 INFO L175 MemorySlicer]: Split 34 memory accesses to 6 slices as follows [2, 11, 7, 4, 7, 3]. 32 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 10 writes are split as follows [0, 3, 2, 1, 3, 1]. [2024-09-17 19:27:02,720 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:27:02" (1/1) ... [2024-09-17 19:27:02,720 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:27:02" (1/1) ... [2024-09-17 19:27:02,724 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:27:02" (1/1) ... [2024-09-17 19:27:02,729 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:27:02" (1/1) ... [2024-09-17 19:27:02,730 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:27:02" (1/1) ... [2024-09-17 19:27:02,732 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:27:02" (1/1) ... [2024-09-17 19:27:02,734 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-17 19:27:02,736 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-17 19:27:02,737 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-17 19:27:02,737 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-17 19:27:02,737 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:27:02" (1/1) ... [2024-09-17 19:27:02,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 19:27:02,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:27:02,764 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) [2024-09-17 19:27:02,766 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 [2024-09-17 19:27:02,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-17 19:27:02,798 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_35_0 [2024-09-17 19:27:02,799 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_35_0 [2024-09-17 19:27:02,799 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-17 19:27:02,799 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-17 19:27:02,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-17 19:27:02,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-17 19:27:02,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-17 19:27:02,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-17 19:27:02,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-17 19:27:02,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-17 19:27:02,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-17 19:27:02,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-17 19:27:02,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-17 19:27:02,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-17 19:27:02,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-17 19:27:02,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-17 19:27:02,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-17 19:27:02,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-17 19:27:02,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-17 19:27:02,802 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_37_to_44_0 [2024-09-17 19:27:02,802 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_37_to_44_0 [2024-09-17 19:27:02,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-17 19:27:02,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-17 19:27:02,803 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-17 19:27:02,803 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-17 19:27:02,803 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-17 19:27:02,803 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-17 19:27:02,803 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-17 19:27:02,803 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-17 19:27:02,804 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-17 19:27:02,804 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-17 19:27:02,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-17 19:27:02,872 INFO L242 CfgBuilder]: Building ICFG [2024-09-17 19:27:02,874 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-17 19:27:03,036 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-09-17 19:27:03,036 INFO L291 CfgBuilder]: Performing block encoding [2024-09-17 19:27:03,054 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-17 19:27:03,054 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-17 19:27:03,054 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 07:27:03 BoogieIcfgContainer [2024-09-17 19:27:03,054 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-17 19:27:03,056 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-17 19:27:03,057 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-17 19:27:03,060 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-17 19:27:03,060 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 07:27:02" (1/3) ... [2024-09-17 19:27:03,061 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a3612ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 07:27:03, skipping insertion in model container [2024-09-17 19:27:03,061 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:27:02" (2/3) ... [2024-09-17 19:27:03,061 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a3612ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 07:27:03, skipping insertion in model container [2024-09-17 19:27:03,061 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 07:27:03" (3/3) ... [2024-09-17 19:27:03,062 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_divbin2.i [2024-09-17 19:27:03,075 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-17 19:27:03,076 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-17 19:27:03,130 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-17 19:27:03,136 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;@7214e0d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-17 19:27:03,136 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-17 19:27:03,139 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 19 states have (on average 1.368421052631579) internal successors, (26), 22 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-17 19:27:03,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-17 19:27:03,144 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:27:03,145 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:27:03,145 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:27:03,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:27:03,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1751035744, now seen corresponding path program 1 times [2024-09-17 19:27:03,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:27:03,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938256178] [2024-09-17 19:27:03,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:27:03,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:27:03,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:03,354 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:27:03,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:03,372 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:27:03,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:03,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:27:03,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:27:03,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938256178] [2024-09-17 19:27:03,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938256178] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:27:03,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 19:27:03,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-17 19:27:03,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917394999] [2024-09-17 19:27:03,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:27:03,389 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-17 19:27:03,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:27:03,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-17 19:27:03,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-17 19:27:03,409 INFO L87 Difference]: Start difference. First operand has 34 states, 19 states have (on average 1.368421052631579) internal successors, (26), 22 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-17 19:27:03,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:27:03,495 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2024-09-17 19:27:03,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-17 19:27:03,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2024-09-17 19:27:03,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:27:03,504 INFO L225 Difference]: With dead ends: 62 [2024-09-17 19:27:03,504 INFO L226 Difference]: Without dead ends: 34 [2024-09-17 19:27:03,507 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-17 19:27:03,509 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:27:03,509 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 30 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:27:03,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-17 19:27:03,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2024-09-17 19:27:03,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 20 states have internal predecessors, (21), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-17 19:27:03,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2024-09-17 19:27:03,540 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 17 [2024-09-17 19:27:03,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:27:03,540 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2024-09-17 19:27:03,540 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-17 19:27:03,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:27:03,541 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2024-09-17 19:27:03,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-17 19:27:03,542 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:27:03,542 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:27:03,542 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-17 19:27:03,543 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:27:03,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:27:03,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1433330127, now seen corresponding path program 1 times [2024-09-17 19:27:03,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:27:03,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238359690] [2024-09-17 19:27:03,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:27:03,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:27:03,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:27:03,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [751019876] [2024-09-17 19:27:03,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:27:03,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:27:03,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:27:03,612 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) [2024-09-17 19:27:03,613 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-17 19:27:03,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:03,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-17 19:27:03,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:27:03,843 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 [2024-09-17 19:27:03,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-17 19:27:03,851 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 11 [2024-09-17 19:27:04,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-17 19:27:04,044 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 15 treesize of output 7 [2024-09-17 19:27:04,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:27:04,092 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 19:27:04,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:27:04,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238359690] [2024-09-17 19:27:04,094 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:27:04,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751019876] [2024-09-17 19:27:04,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751019876] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:27:04,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 19:27:04,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-09-17 19:27:04,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144465006] [2024-09-17 19:27:04,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:27:04,096 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-17 19:27:04,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:27:04,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-17 19:27:04,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-09-17 19:27:04,099 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 10 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-17 19:27:04,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:27:04,293 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2024-09-17 19:27:04,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-17 19:27:04,294 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2024-09-17 19:27:04,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:27:04,296 INFO L225 Difference]: With dead ends: 58 [2024-09-17 19:27:04,297 INFO L226 Difference]: Without dead ends: 54 [2024-09-17 19:27:04,297 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-09-17 19:27:04,298 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 40 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:27:04,299 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 141 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:27:04,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-17 19:27:04,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2024-09-17 19:27:04,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 29 states have (on average 1.206896551724138) internal successors, (35), 32 states have internal predecessors, (35), 11 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2024-09-17 19:27:04,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2024-09-17 19:27:04,319 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 18 [2024-09-17 19:27:04,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:27:04,320 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2024-09-17 19:27:04,320 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-17 19:27:04,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:27:04,320 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2024-09-17 19:27:04,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-17 19:27:04,322 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:27:04,322 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:27:04,339 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-17 19:27:04,526 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:27:04,527 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:27:04,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:27:04,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1475040199, now seen corresponding path program 1 times [2024-09-17 19:27:04,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:27:04,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379121245] [2024-09-17 19:27:04,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:27:04,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:27:04,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:27:04,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1244581991] [2024-09-17 19:27:04,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:27:04,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:27:04,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:27:04,611 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) [2024-09-17 19:27:04,614 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-17 19:27:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:04,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-09-17 19:27:04,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:27:04,841 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 11 [2024-09-17 19:27:04,846 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 [2024-09-17 19:27:04,848 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 11 [2024-09-17 19:27:04,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-17 19:27:04,860 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 [2024-09-17 19:27:05,073 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-17 19:27:05,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2024-09-17 19:27:05,943 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-17 19:27:05,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 52 [2024-09-17 19:27:05,965 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-17 19:27:05,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 73 [2024-09-17 19:27:05,989 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 13 [2024-09-17 19:27:06,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:27:06,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:27:07,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:27:07,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:27:07,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379121245] [2024-09-17 19:27:07,691 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:27:07,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244581991] [2024-09-17 19:27:07,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244581991] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:27:07,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:27:07,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13] total 30 [2024-09-17 19:27:07,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944158563] [2024-09-17 19:27:07,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 19:27:07,692 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-17 19:27:07,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:27:07,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-17 19:27:07,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2024-09-17 19:27:07,694 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 30 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 21 states have internal predecessors, (32), 7 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-17 19:27:13,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-17 19:27:14,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:27:14,252 INFO L93 Difference]: Finished difference Result 110 states and 129 transitions. [2024-09-17 19:27:14,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-17 19:27:14,253 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 21 states have internal predecessors, (32), 7 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 28 [2024-09-17 19:27:14,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:27:14,254 INFO L225 Difference]: With dead ends: 110 [2024-09-17 19:27:14,254 INFO L226 Difference]: Without dead ends: 54 [2024-09-17 19:27:14,255 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=269, Invalid=1801, Unknown=0, NotChecked=0, Total=2070 [2024-09-17 19:27:14,255 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 47 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 23 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2024-09-17 19:27:14,255 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 208 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 444 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2024-09-17 19:27:14,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-17 19:27:14,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-09-17 19:27:14,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 36 states have internal predecessors, (40), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-17 19:27:14,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2024-09-17 19:27:14,274 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 28 [2024-09-17 19:27:14,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:27:14,274 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2024-09-17 19:27:14,274 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 21 states have internal predecessors, (32), 7 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-17 19:27:14,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:27:14,275 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2024-09-17 19:27:14,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-17 19:27:14,275 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:27:14,275 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:27:14,281 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-17 19:27:14,476 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:27:14,476 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:27:14,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:27:14,477 INFO L85 PathProgramCache]: Analyzing trace with hash 207588481, now seen corresponding path program 1 times [2024-09-17 19:27:14,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:27:14,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322742216] [2024-09-17 19:27:14,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:27:14,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:27:14,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:27:14,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1995968198] [2024-09-17 19:27:14,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:27:14,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:27:14,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:27:14,580 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) [2024-09-17 19:27:14,580 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-17 19:27:14,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:14,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 121 conjuncts are in the unsatisfiable core [2024-09-17 19:27:14,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:27:14,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-17 19:27:14,783 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 11 [2024-09-17 19:27:14,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-17 19:27:14,936 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 [2024-09-17 19:27:14,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-17 19:27:14,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-17 19:27:14,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2024-09-17 19:27:14,984 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 25 treesize of output 17 [2024-09-17 19:27:14,987 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 13 [2024-09-17 19:27:14,988 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 [2024-09-17 19:27:15,023 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 19:27:15,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:27:19,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:27:19,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322742216] [2024-09-17 19:27:19,356 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:27:19,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995968198] [2024-09-17 19:27:19,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995968198] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:27:19,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 19:27:19,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-09-17 19:27:19,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672314098] [2024-09-17 19:27:19,357 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 19:27:19,357 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-17 19:27:19,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:27:19,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-17 19:27:19,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=200, Unknown=1, NotChecked=0, Total=240 [2024-09-17 19:27:19,358 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 12 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-17 19:27:19,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:27:19,704 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2024-09-17 19:27:19,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-17 19:27:19,705 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 35 [2024-09-17 19:27:19,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:27:19,706 INFO L225 Difference]: With dead ends: 74 [2024-09-17 19:27:19,706 INFO L226 Difference]: Without dead ends: 72 [2024-09-17 19:27:19,706 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=66, Invalid=313, Unknown=1, NotChecked=0, Total=380 [2024-09-17 19:27:19,707 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 32 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 19:27:19,708 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 229 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 19:27:19,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-17 19:27:19,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2024-09-17 19:27:19,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 46 states have internal predecessors, (50), 13 states have call successors, (13), 11 states have call predecessors, (13), 11 states have return successors, (17), 11 states have call predecessors, (17), 10 states have call successors, (17) [2024-09-17 19:27:19,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2024-09-17 19:27:19,730 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 35 [2024-09-17 19:27:19,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:27:19,730 INFO L474 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2024-09-17 19:27:19,730 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-17 19:27:19,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:27:19,731 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2024-09-17 19:27:19,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-17 19:27:19,732 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:27:19,732 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:27:19,745 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-17 19:27:19,932 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:27:19,933 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:27:19,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:27:19,933 INFO L85 PathProgramCache]: Analyzing trace with hash -2101514835, now seen corresponding path program 1 times [2024-09-17 19:27:19,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:27:19,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429177900] [2024-09-17 19:27:19,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:27:19,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:27:19,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:20,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:27:20,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:20,629 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:27:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:20,930 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:27:20,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:21,110 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-17 19:27:21,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:21,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:27:21,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:21,641 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:27:21,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:21,692 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:27:21,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:21,695 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-17 19:27:21,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:27:21,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429177900] [2024-09-17 19:27:21,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429177900] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:27:21,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113567227] [2024-09-17 19:27:21,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:27:21,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:27:21,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:27:21,703 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) [2024-09-17 19:27:21,711 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-17 19:27:21,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:21,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 99 conjuncts are in the unsatisfiable core [2024-09-17 19:27:21,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:27:21,823 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 11 [2024-09-17 19:27:21,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-17 19:27:21,832 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 15 treesize of output 11 [2024-09-17 19:27:21,834 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 [2024-09-17 19:27:22,070 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 15 treesize of output 11 [2024-09-17 19:27:22,157 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 7 treesize of output 3 [2024-09-17 19:27:22,430 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 [2024-09-17 19:27:23,043 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 27 treesize of output 19 [2024-09-17 19:27:23,046 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-17 19:27:23,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:27:23,629 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 15 treesize of output 11 [2024-09-17 19:27:24,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113567227] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:27:24,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:27:24,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2024-09-17 19:27:24,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180457388] [2024-09-17 19:27:24,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 19:27:24,618 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-17 19:27:24,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:27:24,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-17 19:27:24,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1894, Unknown=0, NotChecked=0, Total=2070 [2024-09-17 19:27:24,620 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand has 34 states, 25 states have (on average 2.04) internal successors, (51), 29 states have internal predecessors, (51), 13 states have call successors, (15), 7 states have call predecessors, (15), 9 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2024-09-17 19:27:26,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:27:26,942 INFO L93 Difference]: Finished difference Result 91 states and 118 transitions. [2024-09-17 19:27:26,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-17 19:27:26,943 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 25 states have (on average 2.04) internal successors, (51), 29 states have internal predecessors, (51), 13 states have call successors, (15), 7 states have call predecessors, (15), 9 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) Word has length 47 [2024-09-17 19:27:26,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:27:26,945 INFO L225 Difference]: With dead ends: 91 [2024-09-17 19:27:26,945 INFO L226 Difference]: Without dead ends: 79 [2024-09-17 19:27:26,946 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=436, Invalid=3724, Unknown=0, NotChecked=0, Total=4160 [2024-09-17 19:27:26,947 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 75 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:27:26,947 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 86 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-17 19:27:26,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-09-17 19:27:26,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2024-09-17 19:27:26,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 47 states have (on average 1.148936170212766) internal successors, (54), 51 states have internal predecessors, (54), 15 states have call successors, (15), 11 states have call predecessors, (15), 15 states have return successors, (32), 15 states have call predecessors, (32), 12 states have call successors, (32) [2024-09-17 19:27:26,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 101 transitions. [2024-09-17 19:27:26,975 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 101 transitions. Word has length 47 [2024-09-17 19:27:26,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:27:26,975 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 101 transitions. [2024-09-17 19:27:26,975 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 25 states have (on average 2.04) internal successors, (51), 29 states have internal predecessors, (51), 13 states have call successors, (15), 7 states have call predecessors, (15), 9 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2024-09-17 19:27:26,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:27:26,975 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 101 transitions. [2024-09-17 19:27:26,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-17 19:27:26,977 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:27:26,977 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:27:26,992 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-17 19:27:27,177 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:27:27,178 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:27:27,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:27:27,178 INFO L85 PathProgramCache]: Analyzing trace with hash 229160102, now seen corresponding path program 2 times [2024-09-17 19:27:27,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:27:27,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401144717] [2024-09-17 19:27:27,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:27:27,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:27:27,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:27,613 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:27:27,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:27,622 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:27:27,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:27,850 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:27:27,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:28,342 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:27:28,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:28,750 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:27:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:29,267 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:27:29,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:29,273 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:27:29,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:29,308 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:27:29,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:27:29,310 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-17 19:27:29,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:27:29,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401144717] [2024-09-17 19:27:29,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401144717] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:27:29,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122284440] [2024-09-17 19:27:29,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 19:27:29,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:27:29,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:27:29,315 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) [2024-09-17 19:27:29,317 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-17 19:27:29,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 19:27:29,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:27:29,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-09-17 19:27:29,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:27:29,437 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 11 [2024-09-17 19:27:29,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-17 19:27:29,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-17 19:27:30,365 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-17 19:27:30,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:27:30,899 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 13 [2024-09-17 19:27:31,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122284440] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:27:31,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:27:31,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15] total 33 [2024-09-17 19:27:31,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957630758] [2024-09-17 19:27:31,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 19:27:31,811 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-17 19:27:31,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:27:31,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-17 19:27:31,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1806, Unknown=0, NotChecked=0, Total=1980 [2024-09-17 19:27:31,813 INFO L87 Difference]: Start difference. First operand 78 states and 101 transitions. Second operand has 33 states, 26 states have (on average 2.076923076923077) internal successors, (54), 29 states have internal predecessors, (54), 13 states have call successors, (16), 6 states have call predecessors, (16), 11 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2024-09-17 19:27:37,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-17 19:27:49,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.84s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-17 19:27:58,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:27:58,354 INFO L93 Difference]: Finished difference Result 95 states and 128 transitions. [2024-09-17 19:27:58,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-17 19:27:58,355 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 26 states have (on average 2.076923076923077) internal successors, (54), 29 states have internal predecessors, (54), 13 states have call successors, (16), 6 states have call predecessors, (16), 11 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 53 [2024-09-17 19:27:58,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:27:58,356 INFO L225 Difference]: With dead ends: 95 [2024-09-17 19:27:58,356 INFO L226 Difference]: Without dead ends: 77 [2024-09-17 19:27:58,358 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=394, Invalid=3894, Unknown=2, NotChecked=0, Total=4290 [2024-09-17 19:27:58,359 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 46 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 33 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2024-09-17 19:27:58,360 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 134 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 873 Invalid, 1 Unknown, 0 Unchecked, 9.0s Time] [2024-09-17 19:27:58,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-17 19:27:58,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2024-09-17 19:27:58,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 46 states have internal predecessors, (48), 14 states have call successors, (14), 10 states have call predecessors, (14), 13 states have return successors, (23), 13 states have call predecessors, (23), 11 states have call successors, (23) [2024-09-17 19:27:58,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2024-09-17 19:27:58,426 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 53 [2024-09-17 19:27:58,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:27:58,426 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2024-09-17 19:27:58,426 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 26 states have (on average 2.076923076923077) internal successors, (54), 29 states have internal predecessors, (54), 13 states have call successors, (16), 6 states have call predecessors, (16), 11 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2024-09-17 19:27:58,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:27:58,427 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2024-09-17 19:27:58,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-17 19:27:58,428 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:27:58,428 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:27:58,441 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-17 19:27:58,631 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-17 19:27:58,632 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:27:58,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:27:58,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1276039393, now seen corresponding path program 2 times [2024-09-17 19:27:58,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:27:58,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016398079] [2024-09-17 19:27:58,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:27:58,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:27:58,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:27:58,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2069087800] [2024-09-17 19:27:58,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 19:27:58,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:27:58,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:27:58,707 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) [2024-09-17 19:27:58,708 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-17 19:27:59,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 19:27:59,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:27:59,029 WARN L260 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 279 conjuncts are in the unsatisfiable core [2024-09-17 19:27:59,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:27:59,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-17 19:27:59,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-17 19:27:59,067 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 11 [2024-09-17 19:27:59,075 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 [2024-09-17 19:27:59,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-17 19:27:59,260 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 15 treesize of output 11 [2024-09-17 19:27:59,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-17 19:28:00,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-17 19:28:00,260 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-09-17 19:28:00,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2024-09-17 19:28:00,362 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-09-17 19:28:00,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 25 [2024-09-17 19:28:00,400 INFO L349 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2024-09-17 19:28:00,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 53 [2024-09-17 19:28:01,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-17 19:28:01,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-17 19:28:01,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-17 19:28:01,770 INFO L349 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2024-09-17 19:28:01,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 82 treesize of output 100 [2024-09-17 19:28:02,482 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-17 19:28:02,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 158 treesize of output 278 [2024-09-17 19:28:02,587 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-17 19:28:02,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 228 treesize of output 296 [2024-09-17 19:28:03,332 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-17 19:28:03,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:28:16,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:28:16,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016398079] [2024-09-17 19:28:16,488 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:28:16,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069087800] [2024-09-17 19:28:16,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069087800] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:28:16,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 19:28:16,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-09-17 19:28:16,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345987941] [2024-09-17 19:28:16,488 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 19:28:16,489 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-17 19:28:16,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:28:16,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-17 19:28:16,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1436, Unknown=2, NotChecked=0, Total=1560 [2024-09-17 19:28:16,490 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand has 27 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 9 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-17 19:28:23,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:28:23,797 INFO L93 Difference]: Finished difference Result 112 states and 137 transitions. [2024-09-17 19:28:23,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-17 19:28:23,798 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 9 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 52 [2024-09-17 19:28:23,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:28:23,799 INFO L225 Difference]: With dead ends: 112 [2024-09-17 19:28:23,799 INFO L226 Difference]: Without dead ends: 106 [2024-09-17 19:28:23,800 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=208, Invalid=2239, Unknown=3, NotChecked=0, Total=2450 [2024-09-17 19:28:23,801 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 31 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-17 19:28:23,801 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 530 Invalid, 992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-09-17 19:28:23,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-09-17 19:28:23,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2024-09-17 19:28:23,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 71 states have internal predecessors, (76), 19 states have call successors, (19), 16 states have call predecessors, (19), 18 states have return successors, (32), 17 states have call predecessors, (32), 16 states have call successors, (32) [2024-09-17 19:28:23,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2024-09-17 19:28:23,855 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 52 [2024-09-17 19:28:23,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:28:23,856 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2024-09-17 19:28:23,856 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 9 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-17 19:28:23,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:28:23,856 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2024-09-17 19:28:23,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-17 19:28:23,857 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:28:23,857 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:28:23,868 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-17 19:28:24,057 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:28:24,058 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:28:24,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:28:24,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1905411784, now seen corresponding path program 3 times [2024-09-17 19:28:24,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:28:24,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059939188] [2024-09-17 19:28:24,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:28:24,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:28:24,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:28:24,620 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:28:24,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:28:24,631 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:28:24,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:28:24,733 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:28:24,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:28:24,746 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-17 19:28:24,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:28:24,756 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-17 19:28:24,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:28:24,759 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-17 19:28:24,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:28:24,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059939188] [2024-09-17 19:28:24,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059939188] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:28:24,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318139937] [2024-09-17 19:28:24,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 19:28:24,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:28:24,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:28:24,761 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:28:24,762 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-17 19:28:25,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-17 19:28:25,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:28:25,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 157 conjuncts are in the unsatisfiable core [2024-09-17 19:28:25,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:28:25,054 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 [2024-09-17 19:28:25,056 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 11 [2024-09-17 19:28:25,060 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 11 [2024-09-17 19:28:25,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-17 19:28:25,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-17 19:28:25,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-17 19:28:25,952 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-17 19:28:25,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 28 [2024-09-17 19:28:26,335 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-17 19:28:26,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:28:27,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318139937] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:28:27,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:28:27,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 31 [2024-09-17 19:28:27,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030069799] [2024-09-17 19:28:27,507 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 19:28:27,508 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-17 19:28:27,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:28:27,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-17 19:28:27,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1499, Unknown=0, NotChecked=0, Total=1640 [2024-09-17 19:28:27,509 INFO L87 Difference]: Start difference. First operand 105 states and 127 transitions. Second operand has 31 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 13 states have call successors, (16), 10 states have call predecessors, (16), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-17 19:28:57,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-17 19:29:01,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-17 19:29:05,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-17 19:29:25,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-17 19:29:29,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-17 19:29:33,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-17 19:29:33,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:29:33,470 INFO L93 Difference]: Finished difference Result 195 states and 229 transitions. [2024-09-17 19:29:33,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-17 19:29:33,470 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 13 states have call successors, (16), 10 states have call predecessors, (16), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 46 [2024-09-17 19:29:33,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:29:33,475 INFO L225 Difference]: With dead ends: 195 [2024-09-17 19:29:33,475 INFO L226 Difference]: Without dead ends: 136 [2024-09-17 19:29:33,478 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 42.7s TimeCoverageRelationStatistics Valid=322, Invalid=3090, Unknown=10, NotChecked=0, Total=3422 [2024-09-17 19:29:33,480 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 69 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 31 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.9s IncrementalHoareTripleChecker+Time [2024-09-17 19:29:33,480 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 138 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 823 Invalid, 6 Unknown, 0 Unchecked, 24.9s Time] [2024-09-17 19:29:33,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-09-17 19:29:33,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2024-09-17 19:29:33,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 87 states have (on average 1.103448275862069) internal successors, (96), 90 states have internal predecessors, (96), 24 states have call successors, (24), 21 states have call predecessors, (24), 22 states have return successors, (36), 22 states have call predecessors, (36), 20 states have call successors, (36) [2024-09-17 19:29:33,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 156 transitions. [2024-09-17 19:29:33,564 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 156 transitions. Word has length 46 [2024-09-17 19:29:33,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:29:33,565 INFO L474 AbstractCegarLoop]: Abstraction has 134 states and 156 transitions. [2024-09-17 19:29:33,565 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 13 states have call successors, (16), 10 states have call predecessors, (16), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-17 19:29:33,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:29:33,566 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 156 transitions. [2024-09-17 19:29:33,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-17 19:29:33,567 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:29:33,567 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:29:33,575 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-17 19:29:33,767 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:29:33,768 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:29:33,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:29:33,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1283866385, now seen corresponding path program 1 times [2024-09-17 19:29:33,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:29:33,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414043847] [2024-09-17 19:29:33,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:29:33,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:29:33,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:29:33,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [78710354] [2024-09-17 19:29:33,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:29:33,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:29:33,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:29:33,802 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:29:33,810 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-17 19:29:33,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:29:33,998 WARN L260 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 208 conjuncts are in the unsatisfiable core [2024-09-17 19:29:34,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:29:34,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-17 19:29:34,008 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 11 [2024-09-17 19:29:34,012 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 11 [2024-09-17 19:29:34,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-17 19:29:34,023 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 [2024-09-17 19:29:34,208 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 15 treesize of output 11 [2024-09-17 19:29:34,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-17 19:29:34,480 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-17 19:29:34,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2024-09-17 19:29:35,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2024-09-17 19:29:35,371 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 9 treesize of output 5 [2024-09-17 19:29:42,819 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-17 19:29:42,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-09-17 19:29:42,829 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-17 19:29:42,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 3 [2024-09-17 19:29:42,869 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-09-17 19:29:42,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 56 [2024-09-17 19:29:43,131 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-17 19:29:43,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 101 treesize of output 249 [2024-09-17 19:29:43,209 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-17 19:29:43,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 189 [2024-09-17 19:29:43,986 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-17 19:29:43,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:30:00,096 WARN L293 SmtUtils]: Spent 15.35s on a formula simplification. DAG size of input: 177 DAG size of output: 175 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-09-17 19:30:11,606 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_old(#memory_int#1)| |c_func_to_recursive_line_37_to_44_0_#in~b.base|) |c_func_to_recursive_line_37_to_44_0_#in~b.offset|)) (.cse2 (forall ((|v_func_to_recursive_line_37_to_44_0_#in~b.offset_BEFORE_CALL_16| Int) (|v_func_to_recursive_line_37_to_44_0_#in~q.base_BEFORE_CALL_6| Int) (|v_func_to_recursive_line_37_to_44_0_#in~r.base_BEFORE_CALL_10| Int) (|v_func_to_recursive_line_37_to_44_0_#in~A.offset_BEFORE_CALL_6| Int) (|v_func_to_recursive_line_37_to_44_0_#in~q.offset_BEFORE_CALL_6| Int) (|v_func_to_recursive_line_37_to_44_0_#in~r.offset_BEFORE_CALL_10| Int) (|v_func_to_recursive_line_37_to_44_0_#in~A.base_BEFORE_CALL_6| Int) (|v_func_to_recursive_line_37_to_44_0_#in~b.base_BEFORE_CALL_16| Int)) (= (mod (select (select |c_#memory_int#3| |v_func_to_recursive_line_37_to_44_0_#in~A.base_BEFORE_CALL_6|) |v_func_to_recursive_line_37_to_44_0_#in~A.offset_BEFORE_CALL_6|) 4294967296) (mod (+ (* (select (select |c_#memory_int#4| |v_func_to_recursive_line_37_to_44_0_#in~q.base_BEFORE_CALL_6|) |v_func_to_recursive_line_37_to_44_0_#in~q.offset_BEFORE_CALL_6|) (select (select |c_#memory_int#1| |v_func_to_recursive_line_37_to_44_0_#in~b.base_BEFORE_CALL_16|) |v_func_to_recursive_line_37_to_44_0_#in~b.offset_BEFORE_CALL_16|)) (select (select |c_#memory_int#2| |v_func_to_recursive_line_37_to_44_0_#in~r.base_BEFORE_CALL_10|) |v_func_to_recursive_line_37_to_44_0_#in~r.offset_BEFORE_CALL_10|)) 4294967296))))) (and (forall ((|v_func_to_recursive_line_37_to_44_0_#in~b.offset_BEFORE_CALL_16| Int) (|v_func_to_recursive_line_37_to_44_0_#in~q.base_BEFORE_CALL_6| Int) (|v_func_to_recursive_line_37_to_44_0_#in~r.base_BEFORE_CALL_10| Int) (|v_func_to_recursive_line_37_to_44_0_#in~A.offset_BEFORE_CALL_6| Int) (|v_func_to_recursive_line_37_to_44_0_#in~q.offset_BEFORE_CALL_6| Int) (|v_func_to_recursive_line_37_to_44_0_#in~r.offset_BEFORE_CALL_10| Int) (|v_func_to_recursive_line_37_to_44_0_#in~A.base_BEFORE_CALL_6| Int) (|v_func_to_recursive_line_37_to_44_0_#in~b.base_BEFORE_CALL_16| Int)) (let ((.cse0 (mod (select (select |c_#memory_int#3| |v_func_to_recursive_line_37_to_44_0_#in~A.base_BEFORE_CALL_6|) |v_func_to_recursive_line_37_to_44_0_#in~A.offset_BEFORE_CALL_6|) 4294967296))) (or (= .cse0 (mod (+ (* (select (select |c_#memory_int#4| |v_func_to_recursive_line_37_to_44_0_#in~q.base_BEFORE_CALL_6|) |v_func_to_recursive_line_37_to_44_0_#in~q.offset_BEFORE_CALL_6|) (select (select |c_#memory_int#1| |v_func_to_recursive_line_37_to_44_0_#in~b.base_BEFORE_CALL_16|) |v_func_to_recursive_line_37_to_44_0_#in~b.offset_BEFORE_CALL_16|)) (select (select |c_#memory_int#2| |v_func_to_recursive_line_37_to_44_0_#in~r.base_BEFORE_CALL_10|) |v_func_to_recursive_line_37_to_44_0_#in~r.offset_BEFORE_CALL_10|)) 4294967296)) (not (= .cse0 (mod (+ (select (select |c_old(#memory_int#2)| |v_func_to_recursive_line_37_to_44_0_#in~r.base_BEFORE_CALL_10|) |v_func_to_recursive_line_37_to_44_0_#in~r.offset_BEFORE_CALL_10|) (* (select (select |c_old(#memory_int#4)| |v_func_to_recursive_line_37_to_44_0_#in~q.base_BEFORE_CALL_6|) |v_func_to_recursive_line_37_to_44_0_#in~q.offset_BEFORE_CALL_6|) (select (select |c_old(#memory_int#1)| |v_func_to_recursive_line_37_to_44_0_#in~b.base_BEFORE_CALL_16|) |v_func_to_recursive_line_37_to_44_0_#in~b.offset_BEFORE_CALL_16|))) 4294967296)))))) (or (= (mod (select (select |c_#memory_int#5| |c_func_to_recursive_line_37_to_44_0_#in~B.base|) |c_func_to_recursive_line_37_to_44_0_#in~B.offset|) 4294967296) (mod .cse1 4294967296)) .cse2) (or (= (mod (+ (* .cse1 (select (select |c_old(#memory_int#4)| |c_func_to_recursive_line_37_to_44_0_#in~q.base|) |c_func_to_recursive_line_37_to_44_0_#in~q.offset|)) (select (select |c_old(#memory_int#2)| |c_func_to_recursive_line_37_to_44_0_#in~r.base|) |c_func_to_recursive_line_37_to_44_0_#in~r.offset|)) 4294967296) (mod (select (select |c_#memory_int#3| |c_func_to_recursive_line_37_to_44_0_#in~A.base|) |c_func_to_recursive_line_37_to_44_0_#in~A.offset|) 4294967296)) .cse2))) is different from false [2024-09-17 19:30:13,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:30:13,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414043847] [2024-09-17 19:30:13,061 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:30:13,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78710354] [2024-09-17 19:30:13,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78710354] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:30:13,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 19:30:13,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2024-09-17 19:30:13,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412787080] [2024-09-17 19:30:13,063 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 19:30:13,064 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-17 19:30:13,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:30:13,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-17 19:30:13,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1072, Unknown=1, NotChecked=66, Total=1260 [2024-09-17 19:30:13,066 INFO L87 Difference]: Start difference. First operand 134 states and 156 transitions. Second operand has 28 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 8 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-17 19:30:18,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:30:18,382 INFO L93 Difference]: Finished difference Result 136 states and 157 transitions. [2024-09-17 19:30:18,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-17 19:30:18,383 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 8 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 47 [2024-09-17 19:30:18,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:30:18,384 INFO L225 Difference]: With dead ends: 136 [2024-09-17 19:30:18,384 INFO L226 Difference]: Without dead ends: 105 [2024-09-17 19:30:18,384 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=295, Invalid=2671, Unknown=8, NotChecked=106, Total=3080 [2024-09-17 19:30:18,385 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 25 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 13 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-17 19:30:18,385 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 170 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 516 Invalid, 2 Unknown, 0 Unchecked, 1.6s Time] [2024-09-17 19:30:18,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-09-17 19:30:18,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2024-09-17 19:30:18,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 71 states have internal predecessors, (76), 19 states have call successors, (19), 16 states have call predecessors, (19), 18 states have return successors, (31), 17 states have call predecessors, (31), 16 states have call successors, (31) [2024-09-17 19:30:18,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 126 transitions. [2024-09-17 19:30:18,436 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 126 transitions. Word has length 47 [2024-09-17 19:30:18,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:30:18,437 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 126 transitions. [2024-09-17 19:30:18,437 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 8 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-17 19:30:18,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:30:18,437 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 126 transitions. [2024-09-17 19:30:18,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-17 19:30:18,438 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:30:18,438 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:30:18,445 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-17 19:30:18,641 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:30:18,642 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:30:18,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:30:18,642 INFO L85 PathProgramCache]: Analyzing trace with hash -2085386019, now seen corresponding path program 1 times [2024-09-17 19:30:18,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:30:18,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314135899] [2024-09-17 19:30:18,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:30:18,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:30:18,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:30:18,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [909959248] [2024-09-17 19:30:18,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:30:18,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:30:18,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:30:18,688 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:30:18,689 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-17 19:30:18,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:30:18,910 WARN L260 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 266 conjuncts are in the unsatisfiable core [2024-09-17 19:30:18,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:30:18,919 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 11 [2024-09-17 19:30:18,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-17 19:30:18,926 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 [2024-09-17 19:30:18,928 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 11 [2024-09-17 19:30:18,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-17 19:30:19,109 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 15 treesize of output 11 [2024-09-17 19:30:19,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-17 19:30:19,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-17 19:30:20,015 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2024-09-17 19:30:20,016 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 2 case distinctions, treesize of input 26 treesize of output 21 [2024-09-17 19:30:20,122 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-17 19:30:20,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-09-17 19:30:20,157 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-09-17 19:30:20,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 61 [2024-09-17 19:30:21,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-17 19:30:21,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-17 19:30:21,594 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-17 19:30:21,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 140 [2024-09-17 19:30:21,639 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-17 19:30:21,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 90 treesize of output 166 [2024-09-17 19:30:21,892 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-17 19:30:21,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:30:35,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:30:35,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314135899] [2024-09-17 19:30:35,418 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:30:35,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909959248] [2024-09-17 19:30:35,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909959248] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:30:35,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 19:30:35,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-09-17 19:30:35,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66616153] [2024-09-17 19:30:35,418 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 19:30:35,419 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-17 19:30:35,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:30:35,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-17 19:30:35,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1504, Unknown=2, NotChecked=0, Total=1640 [2024-09-17 19:30:35,420 INFO L87 Difference]: Start difference. First operand 105 states and 126 transitions. Second operand has 27 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 9 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-17 19:30:42,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:30:42,289 INFO L93 Difference]: Finished difference Result 121 states and 145 transitions. [2024-09-17 19:30:42,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-17 19:30:42,290 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 9 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 52 [2024-09-17 19:30:42,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:30:42,291 INFO L225 Difference]: With dead ends: 121 [2024-09-17 19:30:42,291 INFO L226 Difference]: Without dead ends: 119 [2024-09-17 19:30:42,291 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=242, Invalid=2407, Unknown=3, NotChecked=0, Total=2652 [2024-09-17 19:30:42,292 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 29 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-17 19:30:42,292 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 384 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-17 19:30:42,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-09-17 19:30:42,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2024-09-17 19:30:42,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 80 states have internal predecessors, (85), 21 states have call successors, (21), 18 states have call predecessors, (21), 20 states have return successors, (35), 18 states have call predecessors, (35), 18 states have call successors, (35) [2024-09-17 19:30:42,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2024-09-17 19:30:42,345 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 52 [2024-09-17 19:30:42,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:30:42,345 INFO L474 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2024-09-17 19:30:42,345 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 9 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-17 19:30:42,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:30:42,345 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2024-09-17 19:30:42,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-17 19:30:42,346 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:30:42,346 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:30:42,354 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-17 19:30:42,550 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-17 19:30:42,550 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:30:42,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:30:42,551 INFO L85 PathProgramCache]: Analyzing trace with hash 992478086, now seen corresponding path program 4 times [2024-09-17 19:30:42,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:30:42,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017686151] [2024-09-17 19:30:42,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:30:42,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:30:42,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:30:42,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1872241558] [2024-09-17 19:30:42,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 19:30:42,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:30:42,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:30:42,609 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:30:42,611 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-17 19:30:43,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 19:30:43,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:30:43,023 WARN L260 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 310 conjuncts are in the unsatisfiable core [2024-09-17 19:30:43,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:30:43,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-17 19:30:43,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-17 19:30:43,059 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 [2024-09-17 19:30:43,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-17 19:30:43,068 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 11 [2024-09-17 19:30:43,253 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 15 treesize of output 11 [2024-09-17 19:30:43,394 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 15 treesize of output 11 [2024-09-17 19:30:43,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-17 19:30:44,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-17 19:30:44,564 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-09-17 19:30:44,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2024-09-17 19:30:44,679 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-09-17 19:30:44,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 25 [2024-09-17 19:30:44,707 INFO L349 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2024-09-17 19:30:44,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 53 [2024-09-17 19:30:45,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-17 19:30:45,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-17 19:30:46,061 INFO L349 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2024-09-17 19:30:46,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 117 treesize of output 115 [2024-09-17 19:30:46,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-17 19:30:46,789 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-17 19:30:46,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 201 treesize of output 293 [2024-09-17 19:30:46,905 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-17 19:30:46,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 108 treesize of output 236 [2024-09-17 19:30:47,578 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-17 19:30:47,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:31:18,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:31:18,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017686151] [2024-09-17 19:31:18,889 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:31:18,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872241558] [2024-09-17 19:31:18,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872241558] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:31:18,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 19:31:18,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2024-09-17 19:31:18,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663949648] [2024-09-17 19:31:18,889 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 19:31:18,889 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-17 19:31:18,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:31:18,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-17 19:31:18,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1729, Unknown=4, NotChecked=0, Total=1892 [2024-09-17 19:31:18,890 INFO L87 Difference]: Start difference. First operand 117 states and 141 transitions. Second operand has 29 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7)