./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 --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fb1cb0b9 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-fb1cb0b-m [2024-09-25 11:33:52,034 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 11:33:52,122 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-25 11:33:52,128 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 11:33:52,128 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 11:33:52,152 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 11:33:52,153 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 11:33:52,153 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 11:33:52,154 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 11:33:52,154 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 11:33:52,154 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 11:33:52,155 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 11:33:52,155 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 11:33:52,156 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 11:33:52,156 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 11:33:52,156 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 11:33:52,157 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 11:33:52,157 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 11:33:52,157 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-25 11:33:52,158 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 11:33:52,158 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 11:33:52,163 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 11:33:52,163 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 11:33:52,163 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 11:33:52,167 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 11:33:52,167 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 11:33:52,168 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 11:33:52,168 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 11:33:52,168 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 11:33:52,168 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 11:33:52,168 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 11:33:52,169 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 11:33:52,169 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 11:33:52,169 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 11:33:52,169 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 11:33:52,170 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 11:33:52,170 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-25 11:33:52,170 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-25 11:33:52,170 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 11:33:52,171 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 11:33:52,171 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 11:33:52,172 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 11:33:52,172 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.plugins.generator.traceabstraction: Encode 'modifies' clause in 'ensures' clause of contracts -> true 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 [2024-09-25 11:33:52,528 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 11:33:52,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 11:33:52,556 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 11:33:52,557 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 11:33:52,557 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 11:33:52,558 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i [2024-09-25 11:33:54,022 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 11:33:54,226 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 11:33:54,227 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i [2024-09-25 11:33:54,237 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/388fd9a0f/7be62a6a795c4eb0bdbf1d9cef24a26c/FLAGa421dff82 [2024-09-25 11:33:54,601 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/388fd9a0f/7be62a6a795c4eb0bdbf1d9cef24a26c [2024-09-25 11:33:54,603 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 11:33:54,605 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 11:33:54,608 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 11:33:54,609 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 11:33:54,615 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 11:33:54,618 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:33:54" (1/1) ... [2024-09-25 11:33:54,620 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a1b6bea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:33:54, skipping insertion in model container [2024-09-25 11:33:54,620 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:33:54" (1/1) ... [2024-09-25 11:33:54,647 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 11:33:54,805 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] [2024-09-25 11:33:54,831 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 11:33:54,853 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 11:33:54,866 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] [2024-09-25 11:33:54,884 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 11:33:54,903 INFO L204 MainTranslator]: Completed translation [2024-09-25 11:33:54,904 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:33:54 WrapperNode [2024-09-25 11:33:54,904 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 11:33:54,905 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 11:33:54,906 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 11:33:54,906 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 11:33:54,913 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:33:54" (1/1) ... [2024-09-25 11:33:54,928 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:33:54" (1/1) ... [2024-09-25 11:33:54,938 INFO L138 Inliner]: procedures = 19, calls = 59, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 11:33:54,939 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 11:33:54,940 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 11:33:54,940 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 11:33:54,940 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 11:33:54,950 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:33:54" (1/1) ... [2024-09-25 11:33:54,950 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:33:54" (1/1) ... [2024-09-25 11:33:54,953 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:33:54" (1/1) ... [2024-09-25 11:33:54,980 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]. [2024-09-25 11:33:54,981 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:33:54" (1/1) ... [2024-09-25 11:33:54,981 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:33:54" (1/1) ... [2024-09-25 11:33:54,988 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:33:54" (1/1) ... [2024-09-25 11:33:54,996 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:33:54" (1/1) ... [2024-09-25 11:33:54,998 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:33:54" (1/1) ... [2024-09-25 11:33:55,001 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:33:54" (1/1) ... [2024-09-25 11:33:55,004 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 11:33:55,006 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 11:33:55,007 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 11:33:55,007 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 11:33:55,008 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:33:54" (1/1) ... [2024-09-25 11:33:55,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 11:33:55,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:33:55,049 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) [2024-09-25 11:33:55,053 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 [2024-09-25 11:33:55,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 11:33:55,103 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_35_0 [2024-09-25 11:33:55,104 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_35_0 [2024-09-25 11:33:55,104 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 11:33:55,104 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 11:33:55,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-25 11:33:55,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-25 11:33:55,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-25 11:33:55,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-25 11:33:55,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-25 11:33:55,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-25 11:33:55,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-25 11:33:55,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-25 11:33:55,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-25 11:33:55,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-25 11:33:55,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-25 11:33:55,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-25 11:33:55,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-25 11:33:55,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 11:33:55,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 11:33:55,108 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_37_to_44_0 [2024-09-25 11:33:55,108 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_37_to_44_0 [2024-09-25 11:33:55,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 11:33:55,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 11:33:55,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-25 11:33:55,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-25 11:33:55,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-25 11:33:55,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-25 11:33:55,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-25 11:33:55,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-25 11:33:55,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-25 11:33:55,111 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-25 11:33:55,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-25 11:33:55,223 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 11:33:55,225 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 11:33:55,484 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-09-25 11:33:55,484 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 11:33:55,516 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 11:33:55,516 INFO L317 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-25 11:33:55,516 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:33:55 BoogieIcfgContainer [2024-09-25 11:33:55,517 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 11:33:55,520 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 11:33:55,520 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 11:33:55,524 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 11:33:55,524 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:33:54" (1/3) ... [2024-09-25 11:33:55,525 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5927de02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:33:55, skipping insertion in model container [2024-09-25 11:33:55,526 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:33:54" (2/3) ... [2024-09-25 11:33:55,527 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5927de02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:33:55, skipping insertion in model container [2024-09-25 11:33:55,528 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:33:55" (3/3) ... [2024-09-25 11:33:55,529 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_divbin2.i [2024-09-25 11:33:55,543 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 11:33:55,543 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-25 11:33:55,605 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 11:33:55,613 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;@6e03651f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 11:33:55,613 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-25 11:33:55,618 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) [2024-09-25 11:33:55,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-25 11:33:55,625 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:33:55,626 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:33:55,626 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:33:55,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:33:55,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1751035744, now seen corresponding path program 1 times [2024-09-25 11:33:55,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:33:55,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191639442] [2024-09-25 11:33:55,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:33:55,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:33:55,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:33:55,885 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:33:55,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:33:55,918 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:33:55,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:33:55,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:33:55,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:33:55,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191639442] [2024-09-25 11:33:55,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191639442] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:33:55,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:33:55,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-25 11:33:55,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157989805] [2024-09-25 11:33:55,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:33:55,945 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-25 11:33:55,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:33:55,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-25 11:33:55,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-25 11:33:55,974 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) [2024-09-25 11:33:56,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:33:56,102 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2024-09-25 11:33:56,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-25 11:33:56,105 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 [2024-09-25 11:33:56,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:33:56,115 INFO L225 Difference]: With dead ends: 62 [2024-09-25 11:33:56,115 INFO L226 Difference]: Without dead ends: 34 [2024-09-25 11:33:56,119 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 [2024-09-25 11:33:56,124 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2024-09-25 11:33:56,125 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] [2024-09-25 11:33:56,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-25 11:33:56,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2024-09-25 11:33:56,179 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) [2024-09-25 11:33:56,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2024-09-25 11:33:56,185 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 17 [2024-09-25 11:33:56,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:33:56,186 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2024-09-25 11:33:56,186 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) [2024-09-25 11:33:56,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:33:56,187 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2024-09-25 11:33:56,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-25 11:33:56,189 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:33:56,189 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:33:56,190 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-25 11:33:56,190 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:33:56,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:33:56,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1433330127, now seen corresponding path program 1 times [2024-09-25 11:33:56,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:33:56,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825994213] [2024-09-25 11:33:56,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:33:56,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:33:56,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:33:56,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1636762083] [2024-09-25 11:33:56,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:33:56,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:33:56,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:33:56,318 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) [2024-09-25 11:33:56,319 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-25 11:33:56,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:33:56,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-25 11:33:56,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:33:56,544 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 [2024-09-25 11:33:56,549 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 [2024-09-25 11:33:56,556 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 [2024-09-25 11:33:56,831 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 [2024-09-25 11:33:56,838 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 [2024-09-25 11:33:56,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:33:56,901 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 11:33:56,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:33:56,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825994213] [2024-09-25 11:33:56,902 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:33:56,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636762083] [2024-09-25 11:33:56,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636762083] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:33:56,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:33:56,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-09-25 11:33:56,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598442118] [2024-09-25 11:33:56,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:33:56,907 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-25 11:33:56,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:33:56,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-25 11:33:56,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-09-25 11:33:56,909 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) [2024-09-25 11:33:57,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:33:57,247 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2024-09-25 11:33:57,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-25 11:33:57,248 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 [2024-09-25 11:33:57,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:33:57,250 INFO L225 Difference]: With dead ends: 58 [2024-09-25 11:33:57,250 INFO L226 Difference]: Without dead ends: 54 [2024-09-25 11:33:57,251 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-09-25 11:33:57,253 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 40 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 11:33:57,255 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 141 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 11:33:57,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-25 11:33:57,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2024-09-25 11:33:57,280 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) [2024-09-25 11:33:57,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2024-09-25 11:33:57,281 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 18 [2024-09-25 11:33:57,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:33:57,282 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2024-09-25 11:33:57,282 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) [2024-09-25 11:33:57,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:33:57,283 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2024-09-25 11:33:57,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-25 11:33:57,284 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:33:57,284 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] [2024-09-25 11:33:57,306 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-25 11:33:57,485 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 [2024-09-25 11:33:57,486 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:33:57,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:33:57,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1475040199, now seen corresponding path program 1 times [2024-09-25 11:33:57,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:33:57,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699394792] [2024-09-25 11:33:57,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:33:57,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:33:57,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:33:57,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1231544118] [2024-09-25 11:33:57,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:33:57,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:33:57,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:33:57,585 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) [2024-09-25 11:33:57,587 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-25 11:33:57,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:33:57,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-09-25 11:33:57,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:33:57,908 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 [2024-09-25 11:33:57,915 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 [2024-09-25 11:33:57,919 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 [2024-09-25 11:33:57,928 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 11 treesize of output 7 [2024-09-25 11:33:57,937 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 [2024-09-25 11:33:58,205 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:33:58,206 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 [2024-09-25 11:33:59,381 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:33:59,382 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 [2024-09-25 11:33:59,413 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:33:59,414 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 [2024-09-25 11:33:59,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-25 11:33:59,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:33:59,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:34:01,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:34:01,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:34:01,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699394792] [2024-09-25 11:34:01,593 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:34:01,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231544118] [2024-09-25 11:34:01,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231544118] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:34:01,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 11:34:01,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13] total 30 [2024-09-25 11:34:01,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010323594] [2024-09-25 11:34:01,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 11:34:01,597 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-25 11:34:01,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:34:01,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-25 11:34:01,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2024-09-25 11:34:01,599 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) [2024-09-25 11:34:08,136 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 [] [2024-09-25 11:34:08,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:34:08,590 INFO L93 Difference]: Finished difference Result 110 states and 129 transitions. [2024-09-25 11:34:08,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-25 11:34:08,591 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 [2024-09-25 11:34:08,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:34:08,593 INFO L225 Difference]: With dead ends: 110 [2024-09-25 11:34:08,593 INFO L226 Difference]: Without dead ends: 54 [2024-09-25 11:34:08,594 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=269, Invalid=1801, Unknown=0, NotChecked=0, Total=2070 [2024-09-25 11:34:08,595 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 47 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 23 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s 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, 5.8s IncrementalHoareTripleChecker+Time [2024-09-25 11:34:08,595 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 208 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 444 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2024-09-25 11:34:08,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-25 11:34:08,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-09-25 11:34:08,617 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) [2024-09-25 11:34:08,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2024-09-25 11:34:08,619 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 28 [2024-09-25 11:34:08,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:34:08,619 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2024-09-25 11:34:08,619 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) [2024-09-25 11:34:08,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:34:08,620 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2024-09-25 11:34:08,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-25 11:34:08,621 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:34:08,621 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] [2024-09-25 11:34:08,629 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-25 11:34:08,825 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 [2024-09-25 11:34:08,826 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:34:08,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:34:08,826 INFO L85 PathProgramCache]: Analyzing trace with hash 207588481, now seen corresponding path program 1 times [2024-09-25 11:34:08,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:34:08,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916418063] [2024-09-25 11:34:08,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:34:08,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:34:08,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:34:08,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130315020] [2024-09-25 11:34:08,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:34:08,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:34:08,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:34:08,960 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) [2024-09-25 11:34:08,962 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-25 11:34:09,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:09,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 121 conjuncts are in the unsatisfiable core [2024-09-25 11:34:09,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:34:09,141 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 [2024-09-25 11:34:09,146 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 [2024-09-25 11:34:09,152 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 [2024-09-25 11:34:09,368 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 [2024-09-25 11:34:09,373 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 [2024-09-25 11:34:09,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 11:34:09,387 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 [2024-09-25 11:34:09,441 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 [2024-09-25 11:34:09,445 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 [2024-09-25 11:34:09,448 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 [2024-09-25 11:34:09,493 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 11:34:09,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:34:09,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:34:09,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916418063] [2024-09-25 11:34:09,778 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:34:09,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130315020] [2024-09-25 11:34:09,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130315020] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:34:09,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:34:09,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-09-25 11:34:09,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591918562] [2024-09-25 11:34:09,779 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:34:09,779 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-25 11:34:09,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:34:09,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-25 11:34:09,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-09-25 11:34:09,781 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) [2024-09-25 11:34:10,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:34:10,192 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2024-09-25 11:34:10,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-25 11:34:10,192 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 [2024-09-25 11:34:10,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:34:10,194 INFO L225 Difference]: With dead ends: 74 [2024-09-25 11:34:10,194 INFO L226 Difference]: Without dead ends: 72 [2024-09-25 11:34:10,194 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2024-09-25 11:34:10,195 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 32 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 11:34:10,195 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 229 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 11:34:10,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-25 11:34:10,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2024-09-25 11:34:10,230 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) [2024-09-25 11:34:10,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2024-09-25 11:34:10,232 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 35 [2024-09-25 11:34:10,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:34:10,233 INFO L474 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2024-09-25 11:34:10,233 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) [2024-09-25 11:34:10,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:34:10,233 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2024-09-25 11:34:10,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-25 11:34:10,235 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:34:10,235 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] [2024-09-25 11:34:10,244 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-25 11:34:10,435 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 [2024-09-25 11:34:10,436 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:34:10,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:34:10,437 INFO L85 PathProgramCache]: Analyzing trace with hash -2101514835, now seen corresponding path program 1 times [2024-09-25 11:34:10,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:34:10,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469460796] [2024-09-25 11:34:10,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:34:10,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:34:10,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:11,482 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:34:11,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:11,491 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:34:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:11,883 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 11:34:11,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:12,090 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-25 11:34:12,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:12,637 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:34:12,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:12,652 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-25 11:34:12,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:12,706 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:34:12,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:12,709 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 11:34:12,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:34:12,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469460796] [2024-09-25 11:34:12,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469460796] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:34:12,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889090743] [2024-09-25 11:34:12,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:34:12,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:34:12,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:34:12,713 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) [2024-09-25 11:34:12,715 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-25 11:34:12,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:12,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 99 conjuncts are in the unsatisfiable core [2024-09-25 11:34:12,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:34:12,850 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 [2024-09-25 11:34:12,856 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 [2024-09-25 11:34:12,862 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 [2024-09-25 11:34:12,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:34:13,125 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 [2024-09-25 11:34:13,230 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 [2024-09-25 11:34:13,564 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 [2024-09-25 11:34:14,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-09-25 11:34:14,227 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-25 11:34:14,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:34:14,841 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 [2024-09-25 11:34:15,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889090743] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:34:15,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 11:34:15,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2024-09-25 11:34:15,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598478861] [2024-09-25 11:34:15,834 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 11:34:15,835 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-25 11:34:15,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:34:15,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-25 11:34:15,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1894, Unknown=0, NotChecked=0, Total=2070 [2024-09-25 11:34:15,837 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) [2024-09-25 11:34:18,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:34:18,302 INFO L93 Difference]: Finished difference Result 91 states and 118 transitions. [2024-09-25 11:34:18,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-25 11:34:18,304 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 [2024-09-25 11:34:18,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:34:18,306 INFO L225 Difference]: With dead ends: 91 [2024-09-25 11:34:18,306 INFO L226 Difference]: Without dead ends: 79 [2024-09-25 11:34:18,308 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=436, Invalid=3724, Unknown=0, NotChecked=0, Total=4160 [2024-09-25 11:34:18,308 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 [2024-09-25 11:34:18,309 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] [2024-09-25 11:34:18,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-09-25 11:34:18,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2024-09-25 11:34:18,371 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) [2024-09-25 11:34:18,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 101 transitions. [2024-09-25 11:34:18,374 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 101 transitions. Word has length 47 [2024-09-25 11:34:18,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:34:18,375 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 101 transitions. [2024-09-25 11:34:18,375 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) [2024-09-25 11:34:18,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:34:18,376 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 101 transitions. [2024-09-25 11:34:18,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-25 11:34:18,377 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:34:18,377 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] [2024-09-25 11:34:18,392 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-25 11:34:18,581 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 [2024-09-25 11:34:18,582 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:34:18,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:34:18,582 INFO L85 PathProgramCache]: Analyzing trace with hash 229160102, now seen corresponding path program 2 times [2024-09-25 11:34:18,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:34:18,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966537049] [2024-09-25 11:34:18,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:34:18,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:34:18,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:19,215 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:34:19,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:19,222 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:34:19,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:19,475 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 11:34:19,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:20,304 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 11:34:20,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:20,831 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 11:34:20,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:21,390 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:34:21,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:21,400 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-25 11:34:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:21,449 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:34:21,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:21,452 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-25 11:34:21,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:34:21,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966537049] [2024-09-25 11:34:21,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966537049] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:34:21,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086888435] [2024-09-25 11:34:21,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 11:34:21,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:34:21,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:34:21,454 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) [2024-09-25 11:34:21,456 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-25 11:34:21,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 11:34:21,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:34:21,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-09-25 11:34:21,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:34:21,606 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 [2024-09-25 11:34:21,612 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 [2024-09-25 11:34:21,929 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 [2024-09-25 11:34:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-25 11:34:22,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:34:23,176 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 [2024-09-25 11:34:24,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086888435] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:34:24,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 11:34:24,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15] total 33 [2024-09-25 11:34:24,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501628019] [2024-09-25 11:34:24,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 11:34:24,174 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-25 11:34:24,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:34:24,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-25 11:34:24,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1806, Unknown=0, NotChecked=0, Total=1980 [2024-09-25 11:34:24,176 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) [2024-09-25 11:34:28,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 11:34:33,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 11:34:34,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:34:34,403 INFO L93 Difference]: Finished difference Result 95 states and 128 transitions. [2024-09-25 11:34:34,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-25 11:34:34,403 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 [2024-09-25 11:34:34,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:34:34,405 INFO L225 Difference]: With dead ends: 95 [2024-09-25 11:34:34,405 INFO L226 Difference]: Without dead ends: 77 [2024-09-25 11:34:34,406 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=383, Invalid=3777, Unknown=0, NotChecked=0, Total=4160 [2024-09-25 11:34:34,407 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 47 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 35 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2024-09-25 11:34:34,407 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 133 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 855 Invalid, 1 Unknown, 0 Unchecked, 7.3s Time] [2024-09-25 11:34:34,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-25 11:34:34,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2024-09-25 11:34:34,449 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) [2024-09-25 11:34:34,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2024-09-25 11:34:34,452 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 53 [2024-09-25 11:34:34,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:34:34,452 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2024-09-25 11:34:34,453 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) [2024-09-25 11:34:34,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:34:34,453 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2024-09-25 11:34:34,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-25 11:34:34,457 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:34:34,458 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] [2024-09-25 11:34:34,478 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-25 11:34:34,661 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 [2024-09-25 11:34:34,662 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:34:34,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:34:34,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1276039393, now seen corresponding path program 2 times [2024-09-25 11:34:34,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:34:34,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138009074] [2024-09-25 11:34:34,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:34:34,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:34:34,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:34:34,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1474856922] [2024-09-25 11:34:34,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 11:34:34,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:34:34,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:34:34,750 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) [2024-09-25 11:34:34,753 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-25 11:34:35,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 11:34:35,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:34:35,200 WARN L260 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 279 conjuncts are in the unsatisfiable core [2024-09-25 11:34:35,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:34:35,217 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 [2024-09-25 11:34:35,226 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 [2024-09-25 11:34:35,234 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 [2024-09-25 11:34:35,243 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 [2024-09-25 11:34:35,248 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 [2024-09-25 11:34:35,464 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 [2024-09-25 11:34:35,893 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 [2024-09-25 11:34:36,437 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 [2024-09-25 11:34:36,474 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-09-25 11:34:36,475 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 [2024-09-25 11:34:36,620 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-09-25 11:34:36,620 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 [2024-09-25 11:34:36,651 INFO L349 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2024-09-25 11:34:36,651 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 [2024-09-25 11:34:37,979 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 [2024-09-25 11:34:37,991 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 [2024-09-25 11:34:38,120 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 [2024-09-25 11:34:38,175 INFO L349 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2024-09-25 11:34:38,176 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 [2024-09-25 11:34:38,939 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:34:38,939 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 [2024-09-25 11:34:39,060 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:34:39,061 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 [2024-09-25 11:34:39,953 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 11:34:39,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:34:51,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:34:51,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138009074] [2024-09-25 11:34:51,902 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:34:51,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474856922] [2024-09-25 11:34:51,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474856922] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:34:51,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:34:51,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-09-25 11:34:51,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098203987] [2024-09-25 11:34:51,903 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:34:51,903 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-25 11:34:51,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:34:51,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-25 11:34:51,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1436, Unknown=2, NotChecked=0, Total=1560 [2024-09-25 11:34:51,904 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) [2024-09-25 11:34:59,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:34:59,140 INFO L93 Difference]: Finished difference Result 112 states and 137 transitions. [2024-09-25 11:34:59,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-25 11:34:59,141 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 [2024-09-25 11:34:59,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:34:59,143 INFO L225 Difference]: With dead ends: 112 [2024-09-25 11:34:59,143 INFO L226 Difference]: Without dead ends: 106 [2024-09-25 11:34:59,144 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=208, Invalid=2239, Unknown=3, NotChecked=0, Total=2450 [2024-09-25 11:34:59,145 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 31 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-25 11:34:59,145 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 547 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1093 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-09-25 11:34:59,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-09-25 11:34:59,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2024-09-25 11:34:59,205 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) [2024-09-25 11:34:59,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2024-09-25 11:34:59,206 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 52 [2024-09-25 11:34:59,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:34:59,207 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2024-09-25 11:34:59,207 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) [2024-09-25 11:34:59,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:34:59,207 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2024-09-25 11:34:59,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-25 11:34:59,209 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:34:59,209 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] [2024-09-25 11:34:59,219 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-25 11:34:59,409 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 [2024-09-25 11:34:59,410 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:34:59,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:34:59,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1905411784, now seen corresponding path program 3 times [2024-09-25 11:34:59,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:34:59,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452314487] [2024-09-25 11:34:59,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:34:59,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:34:59,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:35:00,188 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:35:00,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:35:00,201 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:35:00,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:35:00,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 11:35:00,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:35:00,353 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-25 11:35:00,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:35:00,358 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 11:35:00,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:35:00,363 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-25 11:35:00,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:35:00,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452314487] [2024-09-25 11:35:00,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452314487] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:35:00,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102801786] [2024-09-25 11:35:00,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 11:35:00,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:35:00,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:35:00,368 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) [2024-09-25 11:35:00,370 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-25 11:35:00,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-25 11:35:00,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:35:00,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 157 conjuncts are in the unsatisfiable core [2024-09-25 11:35:00,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:35:00,748 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 [2024-09-25 11:35:00,750 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 [2024-09-25 11:35:00,753 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 [2024-09-25 11:35:00,759 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 [2024-09-25 11:35:01,152 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 [2024-09-25 11:35:01,657 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 [2024-09-25 11:35:01,735 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:35:01,735 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 [2024-09-25 11:35:02,060 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-25 11:35:02,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:35:03,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102801786] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:35:03,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 11:35:03,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 31 [2024-09-25 11:35:03,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584036418] [2024-09-25 11:35:03,120 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 11:35:03,120 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-25 11:35:03,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:35:03,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-25 11:35:03,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1499, Unknown=0, NotChecked=0, Total=1640 [2024-09-25 11:35:03,121 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) [2024-09-25 11:35:36,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 11:35:40,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 11:35:44,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 11:35:56,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-25 11:36:00,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 11:36:04,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 11:36:04,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:36:04,821 INFO L93 Difference]: Finished difference Result 195 states and 229 transitions. [2024-09-25 11:36:04,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-25 11:36:04,823 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 [2024-09-25 11:36:04,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:36:04,825 INFO L225 Difference]: With dead ends: 195 [2024-09-25 11:36:04,825 INFO L226 Difference]: Without dead ends: 136 [2024-09-25 11:36:04,826 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 38.4s TimeCoverageRelationStatistics Valid=322, Invalid=3091, Unknown=9, NotChecked=0, Total=3422 [2024-09-25 11:36:04,827 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 73 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 32 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.7s IncrementalHoareTripleChecker+Time [2024-09-25 11:36:04,827 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 111 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 712 Invalid, 6 Unknown, 0 Unchecked, 24.7s Time] [2024-09-25 11:36:04,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-09-25 11:36:04,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2024-09-25 11:36:04,894 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) [2024-09-25 11:36:04,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 156 transitions. [2024-09-25 11:36:04,896 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 156 transitions. Word has length 46 [2024-09-25 11:36:04,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:36:04,896 INFO L474 AbstractCegarLoop]: Abstraction has 134 states and 156 transitions. [2024-09-25 11:36:04,896 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) [2024-09-25 11:36:04,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:36:04,897 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 156 transitions. [2024-09-25 11:36:04,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-25 11:36:04,898 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:36:04,898 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] [2024-09-25 11:36:04,907 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-25 11:36:05,101 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 [2024-09-25 11:36:05,101 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:36:05,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:36:05,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1283866385, now seen corresponding path program 1 times [2024-09-25 11:36:05,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:36:05,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709700396] [2024-09-25 11:36:05,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:36:05,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:36:05,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:36:05,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1655034093] [2024-09-25 11:36:05,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:36:05,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:36:05,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:36:05,147 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) [2024-09-25 11:36:05,148 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-25 11:36:05,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:36:05,412 WARN L260 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 208 conjuncts are in the unsatisfiable core [2024-09-25 11:36:05,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:36:05,422 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 [2024-09-25 11:36:05,426 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 [2024-09-25 11:36:05,432 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 [2024-09-25 11:36:05,440 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 [2024-09-25 11:36:05,446 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 [2024-09-25 11:36:05,629 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 [2024-09-25 11:36:05,813 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 [2024-09-25 11:36:05,880 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:36:05,880 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 [2024-09-25 11:36:06,658 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 [2024-09-25 11:36:06,670 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 [2024-09-25 11:36:10,910 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-25 11:36:10,910 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 [2024-09-25 11:36:10,924 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-25 11:36:10,925 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 [2024-09-25 11:36:10,963 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-09-25 11:36:10,964 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 [2024-09-25 11:36:11,243 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:36:11,243 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 [2024-09-25 11:36:11,299 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:36:11,300 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 [2024-09-25 11:36:11,599 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-25 11:36:11,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:36:23,478 WARN L293 SmtUtils]: Spent 11.35s 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) [2024-09-25 11:36:36,901 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 [2024-09-25 11:36:38,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:36:38,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709700396] [2024-09-25 11:36:38,753 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:36:38,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655034093] [2024-09-25 11:36:38,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655034093] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:36:38,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:36:38,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2024-09-25 11:36:38,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641144032] [2024-09-25 11:36:38,754 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:36:38,754 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-25 11:36:38,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:36:38,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-25 11:36:38,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1072, Unknown=1, NotChecked=66, Total=1260 [2024-09-25 11:36:38,755 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) [2024-09-25 11:36:49,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:36:49,683 INFO L93 Difference]: Finished difference Result 136 states and 157 transitions. [2024-09-25 11:36:49,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-25 11:36:49,684 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 [2024-09-25 11:36:49,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:36:49,685 INFO L225 Difference]: With dead ends: 136 [2024-09-25 11:36:49,685 INFO L226 Difference]: Without dead ends: 105 [2024-09-25 11:36:49,686 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=295, Invalid=2671, Unknown=8, NotChecked=106, Total=3080 [2024-09-25 11:36:49,686 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 25 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-09-25 11:36:49,688 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 216 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 669 Invalid, 2 Unknown, 0 Unchecked, 3.6s Time] [2024-09-25 11:36:49,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-09-25 11:36:49,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2024-09-25 11:36:49,735 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) [2024-09-25 11:36:49,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 126 transitions. [2024-09-25 11:36:49,736 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 126 transitions. Word has length 47 [2024-09-25 11:36:49,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:36:49,736 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 126 transitions. [2024-09-25 11:36:49,736 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) [2024-09-25 11:36:49,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:36:49,737 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 126 transitions. [2024-09-25 11:36:49,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-25 11:36:49,738 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:36:49,738 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] [2024-09-25 11:36:49,747 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-25 11:36:49,938 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 [2024-09-25 11:36:49,939 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:36:49,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:36:49,939 INFO L85 PathProgramCache]: Analyzing trace with hash -2085386019, now seen corresponding path program 1 times [2024-09-25 11:36:49,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:36:49,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272030279] [2024-09-25 11:36:49,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:36:49,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:36:49,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:36:49,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1495855524] [2024-09-25 11:36:49,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:36:49,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:36:49,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:36:49,989 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) [2024-09-25 11:36:49,991 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-25 11:36:50,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:36:50,229 WARN L260 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 266 conjuncts are in the unsatisfiable core [2024-09-25 11:36:50,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:36:50,249 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 [2024-09-25 11:36:50,273 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 [2024-09-25 11:36:50,288 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 [2024-09-25 11:36:50,296 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 [2024-09-25 11:36:50,315 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 [2024-09-25 11:36:50,947 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 [2024-09-25 11:36:52,153 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 [2024-09-25 11:36:53,987 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 [2024-09-25 11:36:54,084 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2024-09-25 11:36:54,085 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 [2024-09-25 11:36:54,459 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-25 11:36:54,459 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 [2024-09-25 11:36:54,625 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-09-25 11:36:54,625 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 [2024-09-25 11:36:57,907 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 [2024-09-25 11:36:57,982 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 [2024-09-25 11:36:59,109 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:36:59,110 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 [2024-09-25 11:36:59,402 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:36:59,403 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 [2024-09-25 11:37:00,303 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 11:37:00,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:37:24,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:37:24,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272030279] [2024-09-25 11:37:24,443 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:37:24,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495855524] [2024-09-25 11:37:24,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495855524] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:37:24,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:37:24,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-09-25 11:37:24,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051069605] [2024-09-25 11:37:24,444 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:37:24,444 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-25 11:37:24,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:37:24,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-25 11:37:24,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1503, Unknown=3, NotChecked=0, Total=1640 [2024-09-25 11:37:24,446 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) [2024-09-25 11:37:36,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:37:36,770 INFO L93 Difference]: Finished difference Result 121 states and 145 transitions. [2024-09-25 11:37:36,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-25 11:37:36,771 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 [2024-09-25 11:37:36,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:37:36,772 INFO L225 Difference]: With dead ends: 121 [2024-09-25 11:37:36,772 INFO L226 Difference]: Without dead ends: 119 [2024-09-25 11:37:36,773 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 31.0s TimeCoverageRelationStatistics Valid=242, Invalid=2406, Unknown=4, NotChecked=0, Total=2652 [2024-09-25 11:37:36,774 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 30 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-09-25 11:37:36,775 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 403 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2024-09-25 11:37:36,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-09-25 11:37:36,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2024-09-25 11:37:36,840 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) [2024-09-25 11:37:36,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2024-09-25 11:37:36,841 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 52 [2024-09-25 11:37:36,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:37:36,841 INFO L474 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2024-09-25 11:37:36,842 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) [2024-09-25 11:37:36,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:37:36,842 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2024-09-25 11:37:36,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-25 11:37:36,843 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:37:36,843 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] [2024-09-25 11:37:36,851 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-25 11:37:37,043 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 [2024-09-25 11:37:37,044 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:37:37,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:37:37,044 INFO L85 PathProgramCache]: Analyzing trace with hash 992478086, now seen corresponding path program 4 times [2024-09-25 11:37:37,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:37:37,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140809338] [2024-09-25 11:37:37,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:37:37,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:37:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:37:37,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [207593003] [2024-09-25 11:37:37,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 11:37:37,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:37:37,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:37:37,121 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) [2024-09-25 11:37:37,122 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-25 11:37:37,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 11:37:37,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:37:37,603 WARN L260 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 310 conjuncts are in the unsatisfiable core [2024-09-25 11:37:37,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:37:37,644 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 [2024-09-25 11:37:37,662 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 [2024-09-25 11:37:37,683 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 [2024-09-25 11:37:37,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:37:37,708 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 [2024-09-25 11:37:38,455 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 [2024-09-25 11:37:39,144 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 [2024-09-25 11:37:40,669 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 [2024-09-25 11:37:42,930 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 [2024-09-25 11:37:42,992 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-09-25 11:37:42,992 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 [2024-09-25 11:37:43,362 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-09-25 11:37:43,362 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 [2024-09-25 11:37:43,492 INFO L349 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2024-09-25 11:37:43,492 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 [2024-09-25 11:37:46,770 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 [2024-09-25 11:37:46,832 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 [2024-09-25 11:37:47,425 INFO L349 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2024-09-25 11:37:47,425 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 [2024-09-25 11:37:47,852 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 [2024-09-25 11:37:49,727 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:37:49,728 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 [2024-09-25 11:37:50,220 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:37:50,221 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 [2024-09-25 11:37:52,025 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-25 11:37:52,025 INFO L327 TraceCheckSpWp]: Computing backward predicates...