./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --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_sqrt1-ll.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ac02a57e98f6481647f49b84c91fda6d0505e35fbffb37ed6b508f20e911a1af --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --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 11:40:42,585 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 11:40:42,666 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-25 11:40:42,670 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 11:40:42,671 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 11:40:42,706 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 11:40:42,706 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 11:40:42,707 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 11:40:42,707 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 11:40:42,708 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 11:40:42,709 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 11:40:42,709 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 11:40:42,710 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 11:40:42,710 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 11:40:42,711 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 11:40:42,711 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 11:40:42,711 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 11:40:42,712 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 11:40:42,712 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-25 11:40:42,712 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 11:40:42,713 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 11:40:42,713 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 11:40:42,713 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 11:40:42,713 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 11:40:42,714 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 11:40:42,714 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 11:40:42,714 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 11:40:42,714 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 11:40:42,715 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 11:40:42,715 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 11:40:42,715 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 11:40:42,715 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 11:40:42,716 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 11:40:42,716 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 11:40:42,716 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 11:40:42,717 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 11:40:42,717 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-25 11:40:42,718 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-25 11:40:42,718 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 11:40:42,718 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 11:40:42,719 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 11:40:42,719 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 11:40:42,719 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac02a57e98f6481647f49b84c91fda6d0505e35fbffb37ed6b508f20e911a1af Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.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 11:40:43,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 11:40:43,030 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 11:40:43,033 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 11:40:43,034 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 11:40:43,037 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 11:40:43,038 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c [2024-09-25 11:40:44,668 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 11:40:44,826 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 11:40:44,827 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c [2024-09-25 11:40:44,838 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/e0bfc0450/abe7bb4f902f48f6a2dd9d81a8d8e652/FLAG66ee8a6f4 [2024-09-25 11:40:44,852 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/e0bfc0450/abe7bb4f902f48f6a2dd9d81a8d8e652 [2024-09-25 11:40:44,858 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 11:40:44,859 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 11:40:44,860 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 11:40:44,862 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 11:40:44,867 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 11:40:44,868 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:40:44" (1/1) ... [2024-09-25 11:40:44,869 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f14638f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:40:44, skipping insertion in model container [2024-09-25 11:40:44,869 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:40:44" (1/1) ... [2024-09-25 11:40:44,889 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 11:40:45,051 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c[1052,1065] [2024-09-25 11:40:45,074 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 11:40:45,085 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 11:40:45,098 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c[1052,1065] [2024-09-25 11:40:45,111 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 11:40:45,128 INFO L204 MainTranslator]: Completed translation [2024-09-25 11:40:45,129 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:40:45 WrapperNode [2024-09-25 11:40:45,129 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 11:40:45,130 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 11:40:45,130 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 11:40:45,131 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 11:40:45,137 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:40:45" (1/1) ... [2024-09-25 11:40:45,144 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:40:45" (1/1) ... [2024-09-25 11:40:45,151 INFO L138 Inliner]: procedures = 16, calls = 58, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 11:40:45,152 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 11:40:45,153 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 11:40:45,154 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 11:40:45,154 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 11:40:45,177 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:40:45" (1/1) ... [2024-09-25 11:40:45,178 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:40:45" (1/1) ... [2024-09-25 11:40:45,181 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:40:45" (1/1) ... [2024-09-25 11:40:45,201 INFO L175 MemorySlicer]: Split 33 memory accesses to 5 slices as follows [2, 2, 9, 12, 8]. 36 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 7 writes are split as follows [0, 1, 2, 2, 2]. [2024-09-25 11:40:45,201 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:40:45" (1/1) ... [2024-09-25 11:40:45,201 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:40:45" (1/1) ... [2024-09-25 11:40:45,207 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:40:45" (1/1) ... [2024-09-25 11:40:45,208 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:40:45" (1/1) ... [2024-09-25 11:40:45,209 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:40:45" (1/1) ... [2024-09-25 11:40:45,210 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:40:45" (1/1) ... [2024-09-25 11:40:45,212 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 11:40:45,213 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 11:40:45,213 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 11:40:45,213 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 11:40:45,216 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:40:45" (1/1) ... [2024-09-25 11:40:45,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 11:40:45,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:40:45,247 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 11:40:45,254 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 11:40:45,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 11:40:45,294 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 11:40:45,294 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 11:40:45,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-25 11:40:45,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-25 11:40:45,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-25 11:40:45,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-25 11:40:45,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-25 11:40:45,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-25 11:40:45,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-25 11:40:45,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-25 11:40:45,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-25 11:40:45,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-25 11:40:45,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-25 11:40:45,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 11:40:45,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 11:40:45,298 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_29_to_40_0 [2024-09-25 11:40:45,298 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_29_to_40_0 [2024-09-25 11:40:45,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 11:40:45,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 11:40:45,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-25 11:40:45,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-25 11:40:45,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-25 11:40:45,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-25 11:40:45,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-25 11:40:45,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-25 11:40:45,300 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-25 11:40:45,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-25 11:40:45,406 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 11:40:45,409 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 11:40:45,625 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-09-25 11:40:45,625 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 11:40:45,650 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 11:40:45,650 INFO L317 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-25 11:40:45,651 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:40:45 BoogieIcfgContainer [2024-09-25 11:40:45,651 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 11:40:45,654 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 11:40:45,655 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 11:40:45,657 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 11:40:45,658 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:40:44" (1/3) ... [2024-09-25 11:40:45,658 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2178c68e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:40:45, skipping insertion in model container [2024-09-25 11:40:45,659 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:40:45" (2/3) ... [2024-09-25 11:40:45,660 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2178c68e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:40:45, skipping insertion in model container [2024-09-25 11:40:45,660 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:40:45" (3/3) ... [2024-09-25 11:40:45,661 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_sqrt1-ll.c [2024-09-25 11:40:45,676 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 11:40:45,676 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-25 11:40:45,747 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 11:40:45,754 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;@25f2f33d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 11:40:45,754 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-25 11:40:45,758 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 20 states have internal predecessors, (22), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 11:40:45,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-25 11:40:45,763 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:40:45,764 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:40:45,764 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:40:45,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:40:45,770 INFO L85 PathProgramCache]: Analyzing trace with hash 793561350, now seen corresponding path program 1 times [2024-09-25 11:40:45,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:40:45,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820531025] [2024-09-25 11:40:45,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:40:45,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:40:45,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:46,515 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:40:46,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:46,521 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 11:40:46,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:40:46,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820531025] [2024-09-25 11:40:46,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820531025] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:40:46,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:40:46,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-25 11:40:46,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750660477] [2024-09-25 11:40:46,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:40:46,534 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-25 11:40:46,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:40:46,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-25 11:40:46,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-25 11:40:46,557 INFO L87 Difference]: Start difference. First operand has 34 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 20 states have internal predecessors, (22), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 11:40:46,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:40:46,801 INFO L93 Difference]: Finished difference Result 80 states and 113 transitions. [2024-09-25 11:40:46,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-25 11:40:46,810 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-09-25 11:40:46,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:40:46,819 INFO L225 Difference]: With dead ends: 80 [2024-09-25 11:40:46,820 INFO L226 Difference]: Without dead ends: 48 [2024-09-25 11:40:46,823 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-25 11:40:46,826 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 17 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 11:40:46,827 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 160 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 11:40:46,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-25 11:40:46,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2024-09-25 11:40:46,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 28 states have internal predecessors, (29), 13 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2024-09-25 11:40:46,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2024-09-25 11:40:46,872 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 12 [2024-09-25 11:40:46,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:40:46,872 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2024-09-25 11:40:46,873 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 11:40:46,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:40:46,874 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2024-09-25 11:40:46,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-25 11:40:46,875 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:40:46,875 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:40:46,875 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-25 11:40:46,876 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:40:46,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:40:46,880 INFO L85 PathProgramCache]: Analyzing trace with hash -179619090, now seen corresponding path program 1 times [2024-09-25 11:40:46,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:40:46,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718483414] [2024-09-25 11:40:46,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:40:46,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:40:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:40:46,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [242045937] [2024-09-25 11:40:46,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:40:46,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:40:46,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:40:46,919 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 11:40:46,921 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 11:40:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:47,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-25 11:40:47,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:40:47,073 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 11:40:47,092 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 11:40:47,404 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 11:40:47,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:40:47,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2024-09-25 11:40:47,885 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 11:40:47,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:40:47,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718483414] [2024-09-25 11:40:47,886 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:40:47,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242045937] [2024-09-25 11:40:47,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242045937] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:40:47,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 11:40:47,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2024-09-25 11:40:47,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217515919] [2024-09-25 11:40:47,888 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 11:40:47,889 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-25 11:40:47,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:40:47,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-25 11:40:47,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2024-09-25 11:40:47,893 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 7 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-25 11:40:51,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-25 11:40:51,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:40:51,265 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2024-09-25 11:40:51,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-25 11:40:51,267 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 7 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 18 [2024-09-25 11:40:51,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:40:51,270 INFO L225 Difference]: With dead ends: 72 [2024-09-25 11:40:51,270 INFO L226 Difference]: Without dead ends: 70 [2024-09-25 11:40:51,271 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2024-09-25 11:40:51,272 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 59 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-09-25 11:40:51,272 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 175 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-09-25 11:40:51,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-09-25 11:40:51,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2024-09-25 11:40:51,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 41 states have internal predecessors, (43), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (15), 14 states have call predecessors, (15), 13 states have call successors, (15) [2024-09-25 11:40:51,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2024-09-25 11:40:51,315 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 18 [2024-09-25 11:40:51,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:40:51,315 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2024-09-25 11:40:51,316 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 7 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-25 11:40:51,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:40:51,316 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2024-09-25 11:40:51,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-25 11:40:51,317 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:40:51,317 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:40:51,334 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-25 11:40:51,518 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 11:40:51,519 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:40:51,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:40:51,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1495099348, now seen corresponding path program 1 times [2024-09-25 11:40:51,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:40:51,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301806386] [2024-09-25 11:40:51,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:40:51,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:40:51,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:40:51,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [230481288] [2024-09-25 11:40:51,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:40:51,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:40:51,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:40:51,553 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 11:40:51,554 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 11:40:51,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:51,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-25 11:40:51,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:40:51,647 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 11:40:51,652 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 11:40:51,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:40:51,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:40:52,194 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 45 treesize of output 29 [2024-09-25 11:40:52,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 11:40:52,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:40:52,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301806386] [2024-09-25 11:40:52,281 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:40:52,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230481288] [2024-09-25 11:40:52,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230481288] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:40:52,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 11:40:52,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2024-09-25 11:40:52,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886748263] [2024-09-25 11:40:52,282 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 11:40:52,282 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-25 11:40:52,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:40:52,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-25 11:40:52,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2024-09-25 11:40:52,284 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand has 22 states, 16 states have (on average 1.625) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-25 11:40:57,603 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 [1] [2024-09-25 11:40:57,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:40:57,670 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2024-09-25 11:40:57,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-25 11:40:57,671 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 1.625) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 24 [2024-09-25 11:40:57,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:40:57,672 INFO L225 Difference]: With dead ends: 92 [2024-09-25 11:40:57,672 INFO L226 Difference]: Without dead ends: 90 [2024-09-25 11:40:57,673 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=235, Invalid=1247, Unknown=0, NotChecked=0, Total=1482 [2024-09-25 11:40:57,674 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 61 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 38 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-09-25 11:40:57,675 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 195 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 477 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2024-09-25 11:40:57,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-09-25 11:40:57,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2024-09-25 11:40:57,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 56 states have internal predecessors, (58), 20 states have call successors, (20), 12 states have call predecessors, (20), 13 states have return successors, (21), 18 states have call predecessors, (21), 17 states have call successors, (21) [2024-09-25 11:40:57,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2024-09-25 11:40:57,722 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 24 [2024-09-25 11:40:57,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:40:57,723 INFO L474 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2024-09-25 11:40:57,723 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 1.625) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-25 11:40:57,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:40:57,724 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2024-09-25 11:40:57,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-25 11:40:57,725 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:40:57,725 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:40:57,743 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 11:40:57,929 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 11:40:57,930 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:40:57,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:40:57,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1496297149, now seen corresponding path program 1 times [2024-09-25 11:40:57,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:40:57,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205392372] [2024-09-25 11:40:57,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:40:57,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:40:57,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:58,727 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:40:58,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:58,731 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 11:40:58,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:58,743 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-25 11:40:58,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:58,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-25 11:40:58,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:58,755 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 11:40:58,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:40:58,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205392372] [2024-09-25 11:40:58,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205392372] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:40:58,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57574017] [2024-09-25 11:40:58,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:40:58,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:40:58,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:40:58,760 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 11:40:58,762 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 11:40:58,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:58,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-25 11:40:58,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:40:59,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2024-09-25 11:40:59,120 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 33 treesize of output 21 [2024-09-25 11:40:59,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-25 11:40:59,162 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 11:40:59,231 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 11:40:59,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:41:03,693 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 11:41:03,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57574017] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:41:03,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:41:03,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 21 [2024-09-25 11:41:03,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888117667] [2024-09-25 11:41:03,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:41:03,695 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-25 11:41:03,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:41:03,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-25 11:41:03,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=356, Unknown=1, NotChecked=0, Total=420 [2024-09-25 11:41:03,700 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand has 21 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (17), 7 states have call predecessors, (17), 4 states have return successors, (10), 3 states have call predecessors, (10), 5 states have call successors, (10) [2024-09-25 11:41:05,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:41:05,567 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2024-09-25 11:41:05,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-25 11:41:05,568 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (17), 7 states have call predecessors, (17), 4 states have return successors, (10), 3 states have call predecessors, (10), 5 states have call successors, (10) Word has length 34 [2024-09-25 11:41:05,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:41:05,570 INFO L225 Difference]: With dead ends: 95 [2024-09-25 11:41:05,570 INFO L226 Difference]: Without dead ends: 93 [2024-09-25 11:41:05,571 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=155, Invalid=774, Unknown=1, NotChecked=0, Total=930 [2024-09-25 11:41:05,572 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 68 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-25 11:41:05,572 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 206 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-25 11:41:05,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-09-25 11:41:05,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2024-09-25 11:41:05,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 57 states have (on average 1.087719298245614) internal successors, (62), 60 states have internal predecessors, (62), 20 states have call successors, (20), 13 states have call predecessors, (20), 15 states have return successors, (23), 19 states have call predecessors, (23), 17 states have call successors, (23) [2024-09-25 11:41:05,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2024-09-25 11:41:05,611 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 34 [2024-09-25 11:41:05,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:41:05,612 INFO L474 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2024-09-25 11:41:05,612 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (17), 7 states have call predecessors, (17), 4 states have return successors, (10), 3 states have call predecessors, (10), 5 states have call successors, (10) [2024-09-25 11:41:05,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:41:05,612 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2024-09-25 11:41:05,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-25 11:41:05,613 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:41:05,613 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:41:05,634 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-25 11:41:05,814 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 11:41:05,814 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:41:05,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:41:05,815 INFO L85 PathProgramCache]: Analyzing trace with hash 2049263454, now seen corresponding path program 1 times [2024-09-25 11:41:05,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:41:05,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223189872] [2024-09-25 11:41:05,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:41:05,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:41:05,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:06,075 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:41:06,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:06,130 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:41:06,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:06,232 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:41:06,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:06,236 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 11:41:06,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:06,239 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-25 11:41:06,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:06,243 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 11:41:06,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:41:06,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223189872] [2024-09-25 11:41:06,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223189872] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:41:06,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:41:06,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-25 11:41:06,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065271837] [2024-09-25 11:41:06,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:41:06,255 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-25 11:41:06,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:41:06,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-25 11:41:06,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-25 11:41:06,257 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-25 11:41:06,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:41:06,999 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2024-09-25 11:41:07,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-25 11:41:07,000 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 34 [2024-09-25 11:41:07,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:41:07,001 INFO L225 Difference]: With dead ends: 99 [2024-09-25 11:41:07,001 INFO L226 Difference]: Without dead ends: 97 [2024-09-25 11:41:07,002 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-09-25 11:41:07,003 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 17 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-25 11:41:07,003 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 66 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-25 11:41:07,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-25 11:41:07,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2024-09-25 11:41:07,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 63 states have internal predecessors, (65), 20 states have call successors, (20), 14 states have call predecessors, (20), 16 states have return successors, (23), 19 states have call predecessors, (23), 17 states have call successors, (23) [2024-09-25 11:41:07,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2024-09-25 11:41:07,041 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 34 [2024-09-25 11:41:07,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:41:07,042 INFO L474 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2024-09-25 11:41:07,042 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-25 11:41:07,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:41:07,042 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2024-09-25 11:41:07,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-25 11:41:07,043 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:41:07,043 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:41:07,044 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-25 11:41:07,044 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:41:07,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:41:07,044 INFO L85 PathProgramCache]: Analyzing trace with hash 863672261, now seen corresponding path program 1 times [2024-09-25 11:41:07,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:41:07,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379299989] [2024-09-25 11:41:07,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:41:07,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:41:07,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:41:07,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1407449463] [2024-09-25 11:41:07,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:41:07,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:41:07,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:41:07,065 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 11:41:07,069 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 11:41:07,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:07,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-25 11:41:07,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:41:07,155 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 11:41:07,165 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 11:41:07,622 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 11:41:07,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:41:08,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:41:08,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379299989] [2024-09-25 11:41:08,030 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:41:08,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407449463] [2024-09-25 11:41:08,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407449463] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:41:08,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:41:08,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-25 11:41:08,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143579531] [2024-09-25 11:41:08,031 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:41:08,031 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-25 11:41:08,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:41:08,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-25 11:41:08,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-09-25 11:41:08,033 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-25 11:41:08,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:41:08,762 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2024-09-25 11:41:08,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-25 11:41:08,762 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2024-09-25 11:41:08,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:41:08,763 INFO L225 Difference]: With dead ends: 105 [2024-09-25 11:41:08,763 INFO L226 Difference]: Without dead ends: 101 [2024-09-25 11:41:08,764 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-09-25 11:41:08,764 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 26 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 25 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-25 11:41:08,765 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 68 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 165 Invalid, 2 Unknown, 0 Unchecked, 0.5s Time] [2024-09-25 11:41:08,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-09-25 11:41:08,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2024-09-25 11:41:08,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 62 states have (on average 1.064516129032258) internal successors, (66), 64 states have internal predecessors, (66), 20 states have call successors, (20), 15 states have call predecessors, (20), 16 states have return successors, (23), 19 states have call predecessors, (23), 17 states have call successors, (23) [2024-09-25 11:41:08,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2024-09-25 11:41:08,800 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 40 [2024-09-25 11:41:08,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:41:08,801 INFO L474 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2024-09-25 11:41:08,801 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-25 11:41:08,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:41:08,802 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2024-09-25 11:41:08,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-25 11:41:08,803 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:41:08,803 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:41:08,820 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 11:41:09,003 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:41:09,004 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:41:09,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:41:09,004 INFO L85 PathProgramCache]: Analyzing trace with hash 398231530, now seen corresponding path program 1 times [2024-09-25 11:41:09,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:41:09,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025285791] [2024-09-25 11:41:09,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:41:09,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:41:09,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:41:09,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [894430127] [2024-09-25 11:41:09,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:41:09,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:41:09,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:41:09,040 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 11:41:09,042 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 11:41:09,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:09,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-25 11:41:09,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:41:09,140 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 11:41:09,149 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 11:41:09,732 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-25 11:41:09,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:41:10,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:41:10,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025285791] [2024-09-25 11:41:10,132 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:41:10,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894430127] [2024-09-25 11:41:10,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894430127] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:41:10,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:41:10,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-25 11:41:10,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309008265] [2024-09-25 11:41:10,133 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:41:10,133 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-25 11:41:10,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:41:10,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-25 11:41:10,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-09-25 11:41:10,134 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-25 11:41:10,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:41:10,808 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2024-09-25 11:41:10,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-25 11:41:10,808 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2024-09-25 11:41:10,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:41:10,810 INFO L225 Difference]: With dead ends: 101 [2024-09-25 11:41:10,810 INFO L226 Difference]: Without dead ends: 81 [2024-09-25 11:41:10,810 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-09-25 11:41:10,811 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 18 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 23 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-25 11:41:10,811 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 68 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 156 Invalid, 3 Unknown, 0 Unchecked, 0.5s Time] [2024-09-25 11:41:10,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-25 11:41:10,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-09-25 11:41:10,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 50 states have (on average 1.06) internal successors, (53), 52 states have internal predecessors, (53), 17 states have call successors, (17), 12 states have call predecessors, (17), 13 states have return successors, (20), 16 states have call predecessors, (20), 15 states have call successors, (20) [2024-09-25 11:41:10,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2024-09-25 11:41:10,849 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 46 [2024-09-25 11:41:10,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:41:10,849 INFO L474 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2024-09-25 11:41:10,849 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-25 11:41:10,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:41:10,849 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2024-09-25 11:41:10,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-25 11:41:10,850 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:41:10,851 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:41:10,863 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 11:41:11,051 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-25 11:41:11,051 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:41:11,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:41:11,052 INFO L85 PathProgramCache]: Analyzing trace with hash 15363389, now seen corresponding path program 1 times [2024-09-25 11:41:11,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:41:11,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953044278] [2024-09-25 11:41:11,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:41:11,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:41:11,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:11,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:41:11,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:11,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:41:11,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:12,600 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:41:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:12,628 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 11:41:12,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:12,647 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-25 11:41:12,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:12,669 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 11:41:12,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:12,842 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:41:12,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:12,845 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 11:41:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:12,849 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-25 11:41:12,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:12,856 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-25 11:41:12,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:41:12,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953044278] [2024-09-25 11:41:12,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953044278] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:41:12,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68496726] [2024-09-25 11:41:12,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:41:12,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:41:12,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:41:12,859 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 11:41:12,862 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 11:41:12,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:12,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-09-25 11:41:12,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:41:12,985 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 11:41:13,004 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 11:41:14,897 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 11:41:14,916 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 11:41:15,132 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-25 11:41:15,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:41:16,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68496726] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:41:16,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 11:41:16,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 21 [2024-09-25 11:41:16,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945717881] [2024-09-25 11:41:16,491 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 11:41:16,492 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-25 11:41:16,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:41:16,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-25 11:41:16,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2024-09-25 11:41:16,493 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 21 states, 16 states have (on average 2.4375) internal successors, (39), 18 states have internal predecessors, (39), 9 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (14), 7 states have call predecessors, (14), 8 states have call successors, (14) [2024-09-25 11:41:18,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:41:18,973 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2024-09-25 11:41:18,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-25 11:41:18,974 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 2.4375) internal successors, (39), 18 states have internal predecessors, (39), 9 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (14), 7 states have call predecessors, (14), 8 states have call successors, (14) Word has length 58 [2024-09-25 11:41:18,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:41:18,975 INFO L225 Difference]: With dead ends: 90 [2024-09-25 11:41:18,975 INFO L226 Difference]: Without dead ends: 88 [2024-09-25 11:41:18,976 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=189, Invalid=1071, Unknown=0, NotChecked=0, Total=1260 [2024-09-25 11:41:18,976 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 35 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-25 11:41:18,977 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 102 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-25 11:41:18,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-25 11:41:19,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2024-09-25 11:41:19,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 56 states have internal predecessors, (57), 18 states have call successors, (18), 13 states have call predecessors, (18), 14 states have return successors, (21), 17 states have call predecessors, (21), 16 states have call successors, (21) [2024-09-25 11:41:19,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2024-09-25 11:41:19,013 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 58 [2024-09-25 11:41:19,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:41:19,013 INFO L474 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2024-09-25 11:41:19,013 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 2.4375) internal successors, (39), 18 states have internal predecessors, (39), 9 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (14), 7 states have call predecessors, (14), 8 states have call successors, (14) [2024-09-25 11:41:19,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:41:19,014 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2024-09-25 11:41:19,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-25 11:41:19,015 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:41:19,015 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:41:19,030 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-25 11:41:19,215 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:41:19,216 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:41:19,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:41:19,216 INFO L85 PathProgramCache]: Analyzing trace with hash 765303396, now seen corresponding path program 1 times [2024-09-25 11:41:19,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:41:19,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230874630] [2024-09-25 11:41:19,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:41:19,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:41:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:41:19,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579489739] [2024-09-25 11:41:19,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:41:19,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:41:19,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:41:19,250 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 11:41:19,252 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 11:41:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:19,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 103 conjuncts are in the unsatisfiable core [2024-09-25 11:41:19,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:41:19,383 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 11:41:19,400 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 11:41:20,139 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 8 treesize of output 1 [2024-09-25 11:41:22,015 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 11:41:22,034 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 11:41:22,169 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:41:22,170 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 23 treesize of output 27 [2024-09-25 11:41:22,620 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 61 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-25 11:41:22,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:41:23,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 67 treesize of output 53 [2024-09-25 11:41:25,067 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 63 treesize of output 43 [2024-09-25 11:41:25,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2024-09-25 11:41:25,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:41:25,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230874630] [2024-09-25 11:41:25,669 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:41:25,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579489739] [2024-09-25 11:41:25,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579489739] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:41:25,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:41:25,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-25 11:41:25,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409169643] [2024-09-25 11:41:25,669 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:41:25,669 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-25 11:41:25,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:41:25,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-25 11:41:25,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=823, Unknown=1, NotChecked=0, Total=930 [2024-09-25 11:41:25,671 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand has 25 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (10), 7 states have call predecessors, (10), 8 states have call successors, (10) [2024-09-25 11:41:30,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:41:30,209 INFO L93 Difference]: Finished difference Result 103 states and 111 transitions. [2024-09-25 11:41:30,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-25 11:41:30,209 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (10), 7 states have call predecessors, (10), 8 states have call successors, (10) Word has length 64 [2024-09-25 11:41:30,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:41:30,210 INFO L225 Difference]: With dead ends: 103 [2024-09-25 11:41:30,210 INFO L226 Difference]: Without dead ends: 99 [2024-09-25 11:41:30,211 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=361, Invalid=2287, Unknown=4, NotChecked=0, Total=2652 [2024-09-25 11:41:30,212 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 75 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 69 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-09-25 11:41:30,212 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 94 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 630 Invalid, 9 Unknown, 0 Unchecked, 1.9s Time] [2024-09-25 11:41:30,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-09-25 11:41:30,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2024-09-25 11:41:30,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 62 states have internal predecessors, (64), 20 states have call successors, (20), 15 states have call predecessors, (20), 15 states have return successors, (22), 19 states have call predecessors, (22), 17 states have call successors, (22) [2024-09-25 11:41:30,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2024-09-25 11:41:30,259 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 64 [2024-09-25 11:41:30,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:41:30,260 INFO L474 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2024-09-25 11:41:30,260 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (10), 7 states have call predecessors, (10), 8 states have call successors, (10) [2024-09-25 11:41:30,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:41:30,260 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2024-09-25 11:41:30,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-25 11:41:30,261 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:41:30,261 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:41:30,276 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 11:41:30,462 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:41:30,462 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:41:30,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:41:30,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1827359346, now seen corresponding path program 2 times [2024-09-25 11:41:30,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:41:30,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946226341] [2024-09-25 11:41:30,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:41:30,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:41:30,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:41:30,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939215613] [2024-09-25 11:41:30,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 11:41:30,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:41:30,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:41:30,493 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 11:41:30,495 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 11:41:30,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 11:41:30,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:41:30,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 115 conjuncts are in the unsatisfiable core [2024-09-25 11:41:30,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:41:30,644 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 11:41:30,655 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 11:41:31,609 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-25 11:41:31,609 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 11:41:31,690 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-25 11:41:31,690 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 11:41:31,828 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 11:41:32,747 INFO L349 Elim1Store]: treesize reduction 35, result has 30.0 percent of original size [2024-09-25 11:41:32,747 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 32 treesize of output 35 [2024-09-25 11:41:32,763 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 11:41:33,457 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 4 proven. 136 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 11:41:33,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:41:34,292 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 45 treesize of output 29 [2024-09-25 11:41:59,521 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 49 treesize of output 41 [2024-09-25 11:41:59,778 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 21 proven. 50 refuted. 3 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-25 11:41:59,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:41:59,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946226341] [2024-09-25 11:41:59,779 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:41:59,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939215613] [2024-09-25 11:41:59,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939215613] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:41:59,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 11:41:59,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 17] total 38 [2024-09-25 11:41:59,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240898205] [2024-09-25 11:41:59,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 11:41:59,780 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-25 11:41:59,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:41:59,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-25 11:41:59,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1266, Unknown=6, NotChecked=0, Total=1406 [2024-09-25 11:41:59,781 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand has 38 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 16 states have call successors, (25), 12 states have call predecessors, (25), 8 states have return successors, (16), 6 states have call predecessors, (16), 10 states have call successors, (16) [2024-09-25 11:42:35,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:42:35,130 INFO L93 Difference]: Finished difference Result 153 states and 162 transitions. [2024-09-25 11:42:35,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-09-25 11:42:35,131 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 16 states have call successors, (25), 12 states have call predecessors, (25), 8 states have return successors, (16), 6 states have call predecessors, (16), 10 states have call successors, (16) Word has length 68 [2024-09-25 11:42:35,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:42:35,133 INFO L225 Difference]: With dead ends: 153 [2024-09-25 11:42:35,133 INFO L226 Difference]: Without dead ends: 151 [2024-09-25 11:42:35,135 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 88 SyntacticMatches, 11 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1758 ImplicationChecksByTransitivity, 55.9s TimeCoverageRelationStatistics Valid=720, Invalid=5911, Unknown=11, NotChecked=0, Total=6642 [2024-09-25 11:42:35,135 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 159 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 1332 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2024-09-25 11:42:35,136 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 448 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1332 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2024-09-25 11:42:35,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-09-25 11:42:35,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 137. [2024-09-25 11:42:35,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 90 states have internal predecessors, (92), 24 states have call successors, (24), 22 states have call predecessors, (24), 24 states have return successors, (29), 24 states have call predecessors, (29), 21 states have call successors, (29) [2024-09-25 11:42:35,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 145 transitions. [2024-09-25 11:42:35,240 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 145 transitions. Word has length 68 [2024-09-25 11:42:35,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:42:35,240 INFO L474 AbstractCegarLoop]: Abstraction has 137 states and 145 transitions. [2024-09-25 11:42:35,241 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 16 states have call successors, (25), 12 states have call predecessors, (25), 8 states have return successors, (16), 6 states have call predecessors, (16), 10 states have call successors, (16) [2024-09-25 11:42:35,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:42:35,241 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 145 transitions. [2024-09-25 11:42:35,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-25 11:42:35,243 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:42:35,245 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:42:35,264 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 11:42:35,446 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:42:35,446 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:42:35,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:42:35,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1393874761, now seen corresponding path program 1 times [2024-09-25 11:42:35,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:42:35,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683247516] [2024-09-25 11:42:35,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:42:35,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:42:35,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:42:35,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1982229708] [2024-09-25 11:42:35,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:42:35,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:42:35,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:42:35,479 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 11:42:35,481 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 11:42:35,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:42:35,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-09-25 11:42:35,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:42:35,629 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 11:42:35,653 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 11:42:37,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2024-09-25 11:42:38,786 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 11:42:38,824 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 11:42:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 18 proven. 91 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-25 11:42:40,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:42:47,232 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 53 treesize of output 45 [2024-09-25 11:42:47,257 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2024-09-25 11:42:47,258 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 69 treesize of output 49 [2024-09-25 11:42:48,145 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:42:48,146 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 61 treesize of output 52 [2024-09-25 11:42:48,418 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 23 [2024-09-25 11:42:49,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:42:49,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683247516] [2024-09-25 11:42:49,104 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:42:49,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982229708] [2024-09-25 11:42:49,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982229708] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:42:49,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:42:49,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-25 11:42:49,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286346655] [2024-09-25 11:42:49,105 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:42:49,105 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-25 11:42:49,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:42:49,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-25 11:42:49,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=985, Unknown=1, NotChecked=0, Total=1122 [2024-09-25 11:42:49,107 INFO L87 Difference]: Start difference. First operand 137 states and 145 transitions. Second operand has 24 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 21 states have internal predecessors, (34), 10 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (11), 6 states have call predecessors, (11), 9 states have call successors, (11) [2024-09-25 11:42:54,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:42:54,845 INFO L93 Difference]: Finished difference Result 139 states and 146 transitions. [2024-09-25 11:42:54,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-25 11:42:54,846 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 21 states have internal predecessors, (34), 10 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (11), 6 states have call predecessors, (11), 9 states have call successors, (11) Word has length 70 [2024-09-25 11:42:54,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:42:54,847 INFO L225 Difference]: With dead ends: 139 [2024-09-25 11:42:54,847 INFO L226 Difference]: Without dead ends: 117 [2024-09-25 11:42:54,848 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 54 SyntacticMatches, 10 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=363, Invalid=2392, Unknown=1, NotChecked=0, Total=2756 [2024-09-25 11:42:54,848 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 35 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 28 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-09-25 11:42:54,848 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 94 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 530 Invalid, 3 Unknown, 0 Unchecked, 2.6s Time] [2024-09-25 11:42:54,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-09-25 11:42:54,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2024-09-25 11:42:54,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 75 states have (on average 1.04) internal successors, (78), 77 states have internal predecessors, (78), 21 states have call successors, (21), 19 states have call predecessors, (21), 20 states have return successors, (25), 20 states have call predecessors, (25), 19 states have call successors, (25) [2024-09-25 11:42:54,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 124 transitions. [2024-09-25 11:42:54,937 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 124 transitions. Word has length 70 [2024-09-25 11:42:54,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:42:54,937 INFO L474 AbstractCegarLoop]: Abstraction has 117 states and 124 transitions. [2024-09-25 11:42:54,937 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 21 states have internal predecessors, (34), 10 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (11), 6 states have call predecessors, (11), 9 states have call successors, (11) [2024-09-25 11:42:54,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:42:54,938 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 124 transitions. [2024-09-25 11:42:54,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-25 11:42:54,939 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:42:54,939 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:42:54,957 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-25 11:42:55,142 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-25 11:42:55,143 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:42:55,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:42:55,143 INFO L85 PathProgramCache]: Analyzing trace with hash 657256540, now seen corresponding path program 2 times [2024-09-25 11:42:55,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:42:55,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409284994] [2024-09-25 11:42:55,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:42:55,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:42:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:42:56,146 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:42:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:42:56,237 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:42:56,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:42:57,659 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:42:57,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:42:57,673 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 11:42:57,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:42:57,687 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-25 11:42:57,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:42:57,703 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 11:42:57,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:42:58,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:42:58,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:42:58,497 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 11:42:58,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:42:58,502 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-25 11:42:58,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:42:58,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 11:42:58,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:42:59,375 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:42:59,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:42:59,382 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 11:42:59,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:42:59,386 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-25 11:42:59,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:42:59,390 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 31 proven. 16 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2024-09-25 11:42:59,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:42:59,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409284994] [2024-09-25 11:42:59,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409284994] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:42:59,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95165683] [2024-09-25 11:42:59,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 11:42:59,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:42:59,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:42:59,392 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 11:42:59,393 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 11:42:59,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 11:42:59,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:42:59,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-09-25 11:42:59,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:43:01,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2024-09-25 11:43:01,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2024-09-25 11:43:01,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-25 11:43:01,890 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 11:43:02,169 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 58 proven. 64 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2024-09-25 11:43:02,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:43:05,036 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:43:05,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 91 [2024-09-25 11:43:05,084 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:43:05,084 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 108 treesize of output 99 [2024-09-25 11:43:05,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95165683] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:43:05,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 11:43:05,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 26 [2024-09-25 11:43:05,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130938407] [2024-09-25 11:43:05,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 11:43:05,889 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-25 11:43:05,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:43:05,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-25 11:43:05,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2024-09-25 11:43:05,891 INFO L87 Difference]: Start difference. First operand 117 states and 124 transitions. Second operand has 26 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 23 states have internal predecessors, (54), 14 states have call successors, (28), 6 states have call predecessors, (28), 7 states have return successors, (25), 11 states have call predecessors, (25), 13 states have call successors, (25) [2024-09-25 11:43:09,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:43:09,128 INFO L93 Difference]: Finished difference Result 123 states and 129 transitions. [2024-09-25 11:43:09,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-25 11:43:09,129 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 23 states have internal predecessors, (54), 14 states have call successors, (28), 6 states have call predecessors, (28), 7 states have return successors, (25), 11 states have call predecessors, (25), 13 states have call successors, (25) Word has length 82 [2024-09-25 11:43:09,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:43:09,130 INFO L225 Difference]: With dead ends: 123 [2024-09-25 11:43:09,130 INFO L226 Difference]: Without dead ends: 121 [2024-09-25 11:43:09,130 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 112 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=260, Invalid=1222, Unknown=0, NotChecked=0, Total=1482 [2024-09-25 11:43:09,131 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 45 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-09-25 11:43:09,131 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 81 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-09-25 11:43:09,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-09-25 11:43:09,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2024-09-25 11:43:09,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 80 states have internal predecessors, (81), 21 states have call successors, (21), 20 states have call predecessors, (21), 21 states have return successors, (25), 20 states have call predecessors, (25), 19 states have call successors, (25) [2024-09-25 11:43:09,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 127 transitions. [2024-09-25 11:43:09,200 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 127 transitions. Word has length 82 [2024-09-25 11:43:09,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:43:09,201 INFO L474 AbstractCegarLoop]: Abstraction has 121 states and 127 transitions. [2024-09-25 11:43:09,201 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 23 states have internal predecessors, (54), 14 states have call successors, (28), 6 states have call predecessors, (28), 7 states have return successors, (25), 11 states have call predecessors, (25), 13 states have call successors, (25) [2024-09-25 11:43:09,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:43:09,201 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 127 transitions. [2024-09-25 11:43:09,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-25 11:43:09,202 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:43:09,202 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:43:09,217 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-25 11:43:09,406 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-25 11:43:09,407 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:43:09,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:43:09,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1385368131, now seen corresponding path program 2 times [2024-09-25 11:43:09,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:43:09,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459164478] [2024-09-25 11:43:09,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:43:09,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:43:09,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:43:09,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1562979964] [2024-09-25 11:43:09,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 11:43:09,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:43:09,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:43:09,442 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:43:09,444 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-25 11:43:09,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 11:43:09,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:43:09,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-09-25 11:43:09,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:43:11,471 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 11:43:11,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2024-09-25 11:43:11,749 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 94 proven. 21 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2024-09-25 11:43:11,749 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:43:14,095 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:43:14,095 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 54 treesize of output 57 [2024-09-25 11:43:14,144 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:43:14,145 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 53 treesize of output 40 [2024-09-25 11:43:14,741 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:43:14,742 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 54 treesize of output 41 [2024-09-25 11:43:14,787 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:43:14,787 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 30 treesize of output 33 [2024-09-25 11:43:19,619 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:43:19,620 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 54 treesize of output 57 [2024-09-25 11:43:19,665 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:43:19,665 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 53 treesize of output 40 [2024-09-25 11:43:20,528 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2024-09-25 11:43:20,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:43:20,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459164478] [2024-09-25 11:43:20,528 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:43:20,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562979964] [2024-09-25 11:43:20,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562979964] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:43:20,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 11:43:20,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2024-09-25 11:43:20,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334909670] [2024-09-25 11:43:20,529 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 11:43:20,529 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-25 11:43:20,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:43:20,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-25 11:43:20,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=198, Unknown=1, NotChecked=0, Total=240 [2024-09-25 11:43:20,530 INFO L87 Difference]: Start difference. First operand 121 states and 127 transitions. Second operand has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (15), 3 states have call predecessors, (15), 5 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) [2024-09-25 11:43:22,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:43:22,349 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2024-09-25 11:43:22,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-25 11:43:22,350 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (15), 3 states have call predecessors, (15), 5 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) Word has length 88 [2024-09-25 11:43:22,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:43:22,351 INFO L225 Difference]: With dead ends: 127 [2024-09-25 11:43:22,351 INFO L226 Difference]: Without dead ends: 123 [2024-09-25 11:43:22,351 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 157 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=97, Invalid=454, Unknown=1, NotChecked=0, Total=552 [2024-09-25 11:43:22,352 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-25 11:43:22,352 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 104 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-25 11:43:22,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-09-25 11:43:22,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2024-09-25 11:43:22,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 80 states have (on average 1.025) internal successors, (82), 81 states have internal predecessors, (82), 21 states have call successors, (21), 21 states have call predecessors, (21), 21 states have return successors, (25), 20 states have call predecessors, (25), 19 states have call successors, (25) [2024-09-25 11:43:22,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 128 transitions. [2024-09-25 11:43:22,464 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 128 transitions. Word has length 88 [2024-09-25 11:43:22,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:43:22,464 INFO L474 AbstractCegarLoop]: Abstraction has 123 states and 128 transitions. [2024-09-25 11:43:22,464 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (15), 3 states have call predecessors, (15), 5 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) [2024-09-25 11:43:22,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:43:22,464 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 128 transitions. [2024-09-25 11:43:22,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-09-25 11:43:22,465 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:43:22,465 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:43:22,482 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-25 11:43:22,666 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:43:22,666 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:43:22,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:43:22,666 INFO L85 PathProgramCache]: Analyzing trace with hash 344499176, now seen corresponding path program 2 times [2024-09-25 11:43:22,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:43:22,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268171902] [2024-09-25 11:43:22,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:43:22,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:43:22,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:43:22,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [929957910] [2024-09-25 11:43:22,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 11:43:22,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:43:22,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:43:22,694 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:43:22,695 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-25 11:43:22,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 11:43:22,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:43:22,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 151 conjuncts are in the unsatisfiable core [2024-09-25 11:43:22,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:43:22,877 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 11:43:22,886 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 11:43:24,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2024-09-25 11:43:30,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2024-09-25 11:44:00,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2024-09-25 11:44:00,837 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 11:44:03,011 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 76 proven. 167 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-09-25 11:44:03,012 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:44:18,187 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 168 treesize of output 138 [2024-09-25 11:44:18,235 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 89 treesize of output 77 [2024-09-25 11:44:18,313 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:44:18,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 175 treesize of output 153 [2024-09-25 11:44:22,118 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:44:22,118 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 235 treesize of output 190 [2024-09-25 11:44:23,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:44:23,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268171902] [2024-09-25 11:44:23,869 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:44:23,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929957910] [2024-09-25 11:44:23,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929957910] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:44:23,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:44:23,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2024-09-25 11:44:23,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962616458] [2024-09-25 11:44:23,869 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:44:23,870 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-25 11:44:23,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:44:23,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-25 11:44:23,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1410, Unknown=7, NotChecked=0, Total=1560 [2024-09-25 11:44:23,871 INFO L87 Difference]: Start difference. First operand 123 states and 128 transitions. Second operand has 30 states, 22 states have (on average 2.090909090909091) internal successors, (46), 26 states have internal predecessors, (46), 13 states have call successors, (17), 7 states have call predecessors, (17), 9 states have return successors, (15), 9 states have call predecessors, (15), 12 states have call successors, (15) [2024-09-25 11:44:29,970 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 11:44:34,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-25 11:44:42,696 WARN L539 Checker$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 11:44:46,790 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 []