./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ac02a57e98f6481647f49b84c91fda6d0505e35fbffb37ed6b508f20e911a1af --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-12 16:43:06,041 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 16:43:06,118 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 16:43:06,125 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 16:43:06,127 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 16:43:06,148 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 16:43:06,151 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 16:43:06,151 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 16:43:06,152 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 16:43:06,152 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 16:43:06,153 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 16:43:06,153 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 16:43:06,156 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 16:43:06,156 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 16:43:06,156 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 16:43:06,157 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 16:43:06,157 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 16:43:06,157 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 16:43:06,158 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 16:43:06,158 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 16:43:06,158 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 16:43:06,162 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 16:43:06,162 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 16:43:06,162 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 16:43:06,163 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 16:43:06,163 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 16:43:06,163 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 16:43:06,163 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 16:43:06,163 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 16:43:06,164 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 16:43:06,164 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 16:43:06,164 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 16:43:06,164 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 16:43:06,165 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 16:43:06,165 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 16:43:06,165 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 16:43:06,166 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 16:43:06,166 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 16:43:06,166 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 16:43:06,169 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 16:43:06,169 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 16:43:06,170 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 16:43:06,170 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac02a57e98f6481647f49b84c91fda6d0505e35fbffb37ed6b508f20e911a1af Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 16:43:06,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 16:43:06,519 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 16:43:06,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 16:43:06,524 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 16:43:06,525 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 16:43:06,527 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c [2024-09-12 16:43:07,977 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 16:43:08,239 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 16:43:08,240 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c [2024-09-12 16:43:08,248 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/ae01bece8/1f8742962039452b9c8ec105d58b324e/FLAG64a464740 [2024-09-12 16:43:08,562 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/ae01bece8/1f8742962039452b9c8ec105d58b324e [2024-09-12 16:43:08,565 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 16:43:08,567 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 16:43:08,567 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 16:43:08,568 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 16:43:08,573 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 16:43:08,574 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 04:43:08" (1/1) ... [2024-09-12 16:43:08,574 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c8c9ab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:43:08, skipping insertion in model container [2024-09-12 16:43:08,575 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 04:43:08" (1/1) ... [2024-09-12 16:43:08,599 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 16:43:08,763 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c[1052,1065] [2024-09-12 16:43:08,785 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 16:43:08,801 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 16:43:08,813 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c[1052,1065] [2024-09-12 16:43:08,827 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 16:43:08,847 INFO L204 MainTranslator]: Completed translation [2024-09-12 16:43:08,848 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:43:08 WrapperNode [2024-09-12 16:43:08,848 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 16:43:08,849 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 16:43:08,849 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 16:43:08,850 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 16:43:08,857 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:43:08" (1/1) ... [2024-09-12 16:43:08,867 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:43:08" (1/1) ... [2024-09-12 16:43:08,878 INFO L138 Inliner]: procedures = 16, calls = 58, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 16:43:08,879 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 16:43:08,880 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 16:43:08,880 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 16:43:08,880 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 16:43:08,889 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:43:08" (1/1) ... [2024-09-12 16:43:08,889 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:43:08" (1/1) ... [2024-09-12 16:43:08,892 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:43:08" (1/1) ... [2024-09-12 16:43:08,915 INFO L175 MemorySlicer]: Split 33 memory accesses to 5 slices as follows [2, 2, 12, 9, 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]. [2024-09-12 16:43:08,916 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:43:08" (1/1) ... [2024-09-12 16:43:08,916 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:43:08" (1/1) ... [2024-09-12 16:43:08,939 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:43:08" (1/1) ... [2024-09-12 16:43:08,951 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:43:08" (1/1) ... [2024-09-12 16:43:08,952 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:43:08" (1/1) ... [2024-09-12 16:43:08,965 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:43:08" (1/1) ... [2024-09-12 16:43:08,967 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 16:43:08,968 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 16:43:08,968 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 16:43:08,969 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 16:43:08,973 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:43:08" (1/1) ... [2024-09-12 16:43:08,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 16:43:09,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:43:09,041 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-12 16:43:09,046 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-12 16:43:09,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 16:43:09,097 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 16:43:09,097 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 16:43:09,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 16:43:09,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-12 16:43:09,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-12 16:43:09,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-12 16:43:09,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-12 16:43:09,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-12 16:43:09,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-12 16:43:09,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-12 16:43:09,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-12 16:43:09,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-12 16:43:09,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-12 16:43:09,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 16:43:09,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 16:43:09,101 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_29_to_40_0 [2024-09-12 16:43:09,101 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_29_to_40_0 [2024-09-12 16:43:09,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 16:43:09,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 16:43:09,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-12 16:43:09,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-12 16:43:09,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-12 16:43:09,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-12 16:43:09,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-12 16:43:09,103 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 16:43:09,104 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 16:43:09,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-12 16:43:09,219 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 16:43:09,221 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 16:43:09,491 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-09-12 16:43:09,492 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 16:43:09,518 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 16:43:09,519 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-12 16:43:09,520 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 04:43:09 BoogieIcfgContainer [2024-09-12 16:43:09,520 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 16:43:09,523 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 16:43:09,523 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 16:43:09,526 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 16:43:09,527 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 04:43:08" (1/3) ... [2024-09-12 16:43:09,527 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42743001 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 04:43:09, skipping insertion in model container [2024-09-12 16:43:09,527 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:43:08" (2/3) ... [2024-09-12 16:43:09,528 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42743001 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 04:43:09, skipping insertion in model container [2024-09-12 16:43:09,528 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 04:43:09" (3/3) ... [2024-09-12 16:43:09,530 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_sqrt1-ll.c [2024-09-12 16:43:09,546 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 16:43:09,546 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 16:43:09,623 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 16:43:09,629 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;@3d45aac2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 16:43:09,630 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 16:43:09,634 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) [2024-09-12 16:43:09,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-12 16:43:09,640 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:43:09,640 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:43:09,641 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:43:09,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:43:09,646 INFO L85 PathProgramCache]: Analyzing trace with hash 793561350, now seen corresponding path program 1 times [2024-09-12 16:43:09,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:43:09,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482849150] [2024-09-12 16:43:09,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:43:09,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:43:09,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:43:10,433 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:43:10,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:43:10,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 16:43:10,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:43:10,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482849150] [2024-09-12 16:43:10,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482849150] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 16:43:10,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 16:43:10,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-12 16:43:10,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030944176] [2024-09-12 16:43:10,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:43:10,457 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 16:43:10,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:43:10,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 16:43:10,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-12 16:43:10,483 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) [2024-09-12 16:43:10,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:43:10,759 INFO L93 Difference]: Finished difference Result 80 states and 113 transitions. [2024-09-12 16:43:10,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 16:43:10,762 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 [2024-09-12 16:43:10,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:43:10,768 INFO L225 Difference]: With dead ends: 80 [2024-09-12 16:43:10,768 INFO L226 Difference]: Without dead ends: 48 [2024-09-12 16:43:10,772 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 [2024-09-12 16:43:10,778 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 [2024-09-12 16:43:10,779 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] [2024-09-12 16:43:10,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-12 16:43:10,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2024-09-12 16:43:10,827 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) [2024-09-12 16:43:10,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2024-09-12 16:43:10,834 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 12 [2024-09-12 16:43:10,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:43:10,835 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2024-09-12 16:43:10,835 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) [2024-09-12 16:43:10,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:43:10,835 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2024-09-12 16:43:10,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-12 16:43:10,839 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:43:10,840 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:43:10,840 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 16:43:10,840 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:43:10,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:43:10,844 INFO L85 PathProgramCache]: Analyzing trace with hash -179619090, now seen corresponding path program 1 times [2024-09-12 16:43:10,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:43:10,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950824233] [2024-09-12 16:43:10,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:43:10,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:43:10,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:43:10,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1988285180] [2024-09-12 16:43:10,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:43:10,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:43:10,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:43:10,895 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:43:10,897 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 16:43:11,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:43:11,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-12 16:43:11,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:43:11,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-12 16:43:11,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-12 16:43:11,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 16:43:11,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:43:11,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 16:43:11,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:43:11,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950824233] [2024-09-12 16:43:11,493 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:43:11,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988285180] [2024-09-12 16:43:11,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988285180] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-12 16:43:11,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:43:11,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-09-12 16:43:11,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532159960] [2024-09-12 16:43:11,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:43:11,495 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 16:43:11,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:43:11,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 16:43:11,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-12 16:43:11,499 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-12 16:43:11,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:43:11,740 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2024-09-12 16:43:11,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 16:43:11,740 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2024-09-12 16:43:11,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:43:11,742 INFO L225 Difference]: With dead ends: 54 [2024-09-12 16:43:11,742 INFO L226 Difference]: Without dead ends: 52 [2024-09-12 16:43:11,742 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-09-12 16:43:11,743 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 16:43:11,744 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 148 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 16:43:11,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-12 16:43:11,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2024-09-12 16:43:11,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 29 states have (on average 1.103448275862069) internal successors, (32), 31 states have internal predecessors, (32), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2024-09-12 16:43:11,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2024-09-12 16:43:11,764 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 18 [2024-09-12 16:43:11,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:43:11,765 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2024-09-12 16:43:11,765 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-12 16:43:11,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:43:11,766 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2024-09-12 16:43:11,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-12 16:43:11,767 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:43:11,767 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] [2024-09-12 16:43:11,784 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 16:43:11,967 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 [2024-09-12 16:43:11,968 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:43:11,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:43:11,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1495099348, now seen corresponding path program 1 times [2024-09-12 16:43:11,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:43:11,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774247087] [2024-09-12 16:43:11,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:43:11,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:43:12,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:43:12,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [80301463] [2024-09-12 16:43:12,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:43:12,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:43:12,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:43:12,005 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:43:12,008 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 16:43:12,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:43:12,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-12 16:43:12,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:43:12,102 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 [2024-09-12 16:43:12,106 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 [2024-09-12 16:43:12,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 16:43:12,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:43:12,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 16:43:12,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:43:12,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774247087] [2024-09-12 16:43:12,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:43:12,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80301463] [2024-09-12 16:43:12,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80301463] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-12 16:43:12,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:43:12,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-09-12 16:43:12,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593400187] [2024-09-12 16:43:12,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:43:12,543 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 16:43:12,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:43:12,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 16:43:12,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-12 16:43:12,544 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 16:43:12,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:43:12,920 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2024-09-12 16:43:12,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 16:43:12,922 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-09-12 16:43:12,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:43:12,924 INFO L225 Difference]: With dead ends: 64 [2024-09-12 16:43:12,924 INFO L226 Difference]: Without dead ends: 62 [2024-09-12 16:43:12,925 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-09-12 16:43:12,929 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 16:43:12,930 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 121 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 16:43:12,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-09-12 16:43:12,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2024-09-12 16:43:12,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 35 states have internal predecessors, (36), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2024-09-12 16:43:12,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2024-09-12 16:43:12,964 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 24 [2024-09-12 16:43:12,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:43:12,964 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2024-09-12 16:43:12,964 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 16:43:12,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:43:12,965 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2024-09-12 16:43:12,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-12 16:43:12,966 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:43:12,966 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] [2024-09-12 16:43:12,985 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-12 16:43:13,166 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 [2024-09-12 16:43:13,167 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:43:13,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:43:13,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1496297149, now seen corresponding path program 1 times [2024-09-12 16:43:13,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:43:13,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970693176] [2024-09-12 16:43:13,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:43:13,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:43:13,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:43:14,008 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:43:14,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:43:14,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-12 16:43:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:43:14,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-12 16:43:14,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:43:14,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-12 16:43:14,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:43:14,027 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 16:43:14,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:43:14,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970693176] [2024-09-12 16:43:14,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970693176] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:43:14,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912673736] [2024-09-12 16:43:14,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:43:14,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:43:14,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:43:14,030 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:43:14,032 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 16:43:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:43:14,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-12 16:43:14,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:43:14,374 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 [2024-09-12 16:43:14,380 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 [2024-09-12 16:43:14,423 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 [2024-09-12 16:43:14,426 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 [2024-09-12 16:43:14,477 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 16:43:14,477 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:43:19,036 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 16:43:19,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912673736] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:43:19,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:43:19,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 21 [2024-09-12 16:43:19,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725662821] [2024-09-12 16:43:19,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:43:19,037 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-12 16:43:19,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:43:19,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-12 16:43:19,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=356, Unknown=1, NotChecked=0, Total=420 [2024-09-12 16:43:19,038 INFO L87 Difference]: Start difference. First operand 55 states and 62 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) [2024-09-12 16:43:21,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:43:21,861 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2024-09-12 16:43:21,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-12 16:43:21,862 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 [2024-09-12 16:43:21,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:43:21,864 INFO L225 Difference]: With dead ends: 80 [2024-09-12 16:43:21,864 INFO L226 Difference]: Without dead ends: 78 [2024-09-12 16:43:21,865 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=155, Invalid=774, Unknown=1, NotChecked=0, Total=930 [2024-09-12 16:43:21,865 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 74 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-09-12 16:43:21,866 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 179 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-09-12 16:43:21,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-09-12 16:43:21,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2024-09-12 16:43:21,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 47 states have internal predecessors, (48), 17 states have call successors, (17), 10 states have call predecessors, (17), 11 states have return successors, (20), 16 states have call predecessors, (20), 15 states have call successors, (20) [2024-09-12 16:43:21,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2024-09-12 16:43:21,907 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 34 [2024-09-12 16:43:21,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:43:21,907 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2024-09-12 16:43:21,908 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) [2024-09-12 16:43:21,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:43:21,908 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2024-09-12 16:43:21,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-12 16:43:21,909 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:43:21,909 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] [2024-09-12 16:43:21,928 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-12 16:43:22,109 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 [2024-09-12 16:43:22,110 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:43:22,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:43:22,111 INFO L85 PathProgramCache]: Analyzing trace with hash 2049263454, now seen corresponding path program 1 times [2024-09-12 16:43:22,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:43:22,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999191230] [2024-09-12 16:43:22,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:43:22,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:43:22,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:43:22,532 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:43:22,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:43:22,621 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:43:22,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:43:22,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:43:22,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:43:22,764 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-12 16:43:22,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:43:22,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-12 16:43:22,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:43:22,771 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 16:43:22,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:43:22,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999191230] [2024-09-12 16:43:22,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999191230] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 16:43:22,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 16:43:22,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-12 16:43:22,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885744252] [2024-09-12 16:43:22,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:43:22,773 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 16:43:22,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:43:22,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 16:43:22,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-12 16:43:22,774 INFO L87 Difference]: Start difference. First operand 73 states and 85 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) [2024-09-12 16:43:23,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:43:23,540 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2024-09-12 16:43:23,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-12 16:43:23,541 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 [2024-09-12 16:43:23,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:43:23,542 INFO L225 Difference]: With dead ends: 84 [2024-09-12 16:43:23,542 INFO L226 Difference]: Without dead ends: 82 [2024-09-12 16:43:23,543 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-09-12 16:43:23,543 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 23 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-12 16:43:23,544 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 65 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-12 16:43:23,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-09-12 16:43:23,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2024-09-12 16:43:23,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 52 states have internal predecessors, (53), 18 states have call successors, (18), 11 states have call predecessors, (18), 13 states have return successors, (22), 17 states have call predecessors, (22), 16 states have call successors, (22) [2024-09-12 16:43:23,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2024-09-12 16:43:23,587 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 34 [2024-09-12 16:43:23,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:43:23,587 INFO L474 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2024-09-12 16:43:23,587 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) [2024-09-12 16:43:23,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:43:23,588 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2024-09-12 16:43:23,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-12 16:43:23,589 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:43:23,589 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:43:23,589 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-12 16:43:23,589 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:43:23,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:43:23,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1759830379, now seen corresponding path program 2 times [2024-09-12 16:43:23,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:43:23,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037044974] [2024-09-12 16:43:23,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:43:23,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:43:23,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:43:23,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1916832830] [2024-09-12 16:43:23,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 16:43:23,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:43:23,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:43:23,614 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:43:23,616 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 16:43:23,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 16:43:23,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:43:23,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-09-12 16:43:23,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:43:23,755 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 [2024-09-12 16:43:23,780 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 [2024-09-12 16:43:25,970 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-12 16:43:25,970 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 [2024-09-12 16:43:26,085 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-12 16:43:26,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-09-12 16:43:26,963 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 16:43:26,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:43:28,544 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 [2024-09-12 16:43:28,781 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-12 16:43:28,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:43:28,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037044974] [2024-09-12 16:43:28,781 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:43:28,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916832830] [2024-09-12 16:43:28,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916832830] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:43:28,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:43:28,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 27 [2024-09-12 16:43:28,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135457494] [2024-09-12 16:43:28,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:43:28,782 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-12 16:43:28,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:43:28,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-12 16:43:28,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2024-09-12 16:43:28,784 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 27 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 22 states have internal predecessors, (41), 11 states have call successors, (16), 8 states have call predecessors, (16), 6 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-12 16:43:34,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:43:34,903 INFO L93 Difference]: Finished difference Result 125 states and 134 transitions. [2024-09-12 16:43:34,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-12 16:43:34,904 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 22 states have internal predecessors, (41), 11 states have call successors, (16), 8 states have call predecessors, (16), 6 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) Word has length 40 [2024-09-12 16:43:34,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:43:34,906 INFO L225 Difference]: With dead ends: 125 [2024-09-12 16:43:34,906 INFO L226 Difference]: Without dead ends: 123 [2024-09-12 16:43:34,909 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=341, Invalid=2209, Unknown=0, NotChecked=0, Total=2550 [2024-09-12 16:43:34,909 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 98 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-09-12 16:43:34,910 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 263 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-09-12 16:43:34,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-09-12 16:43:34,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 109. [2024-09-12 16:43:34,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 72 states have internal predecessors, (74), 20 states have call successors, (20), 17 states have call predecessors, (20), 19 states have return successors, (23), 19 states have call predecessors, (23), 17 states have call successors, (23) [2024-09-12 16:43:34,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 117 transitions. [2024-09-12 16:43:34,971 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 117 transitions. Word has length 40 [2024-09-12 16:43:34,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:43:34,971 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 117 transitions. [2024-09-12 16:43:34,972 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 22 states have internal predecessors, (41), 11 states have call successors, (16), 8 states have call predecessors, (16), 6 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-12 16:43:34,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:43:34,972 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 117 transitions. [2024-09-12 16:43:34,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-12 16:43:34,973 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:43:34,974 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] [2024-09-12 16:43:34,992 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-12 16:43:35,177 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:43:35,178 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:43:35,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:43:35,178 INFO L85 PathProgramCache]: Analyzing trace with hash 863672261, now seen corresponding path program 1 times [2024-09-12 16:43:35,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:43:35,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059400249] [2024-09-12 16:43:35,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:43:35,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:43:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:43:35,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1798415233] [2024-09-12 16:43:35,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:43:35,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:43:35,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:43:35,206 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:43:35,207 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 16:43:35,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:43:35,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-12 16:43:35,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:43:35,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-12 16:43:35,331 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 [2024-09-12 16:43:35,925 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 16:43:35,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:43:36,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:43:36,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059400249] [2024-09-12 16:43:36,539 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:43:36,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798415233] [2024-09-12 16:43:36,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798415233] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:43:36,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:43:36,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-12 16:43:36,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933086095] [2024-09-12 16:43:36,539 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 16:43:36,539 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 16:43:36,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:43:36,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 16:43:36,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-09-12 16:43:36,540 INFO L87 Difference]: Start difference. First operand 109 states and 117 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) [2024-09-12 16:43:37,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:43:37,605 INFO L93 Difference]: Finished difference Result 117 states and 123 transitions. [2024-09-12 16:43:37,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 16:43:37,606 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 [2024-09-12 16:43:37,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:43:37,607 INFO L225 Difference]: With dead ends: 117 [2024-09-12 16:43:37,607 INFO L226 Difference]: Without dead ends: 113 [2024-09-12 16:43:37,607 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-09-12 16:43:37,608 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 26 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 25 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.7s IncrementalHoareTripleChecker+Time [2024-09-12 16:43:37,608 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 68 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 165 Invalid, 2 Unknown, 0 Unchecked, 0.7s Time] [2024-09-12 16:43:37,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-09-12 16:43:37,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2024-09-12 16:43:37,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 71 states have (on average 1.056338028169014) internal successors, (75), 73 states have internal predecessors, (75), 20 states have call successors, (20), 18 states have call predecessors, (20), 19 states have return successors, (23), 19 states have call predecessors, (23), 17 states have call successors, (23) [2024-09-12 16:43:37,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 118 transitions. [2024-09-12 16:43:37,645 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 118 transitions. Word has length 40 [2024-09-12 16:43:37,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:43:37,645 INFO L474 AbstractCegarLoop]: Abstraction has 111 states and 118 transitions. [2024-09-12 16:43:37,645 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) [2024-09-12 16:43:37,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:43:37,646 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 118 transitions. [2024-09-12 16:43:37,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-12 16:43:37,647 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:43:37,647 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] [2024-09-12 16:43:37,660 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-12 16:43:37,848 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-12 16:43:37,848 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:43:37,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:43:37,849 INFO L85 PathProgramCache]: Analyzing trace with hash 398231530, now seen corresponding path program 1 times [2024-09-12 16:43:37,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:43:37,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140406741] [2024-09-12 16:43:37,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:43:37,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:43:37,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:43:37,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1577680596] [2024-09-12 16:43:37,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:43:37,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:43:37,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:43:37,872 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:43:37,879 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 16:43:37,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:43:37,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-12 16:43:37,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:43:37,978 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 [2024-09-12 16:43:37,994 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 [2024-09-12 16:43:38,784 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-12 16:43:38,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:43:39,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:43:39,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140406741] [2024-09-12 16:43:39,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:43:39,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577680596] [2024-09-12 16:43:39,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577680596] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:43:39,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:43:39,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-12 16:43:39,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889809656] [2024-09-12 16:43:39,434 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 16:43:39,434 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 16:43:39,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:43:39,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 16:43:39,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-09-12 16:43:39,435 INFO L87 Difference]: Start difference. First operand 111 states and 118 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) [2024-09-12 16:43:40,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:43:40,457 INFO L93 Difference]: Finished difference Result 113 states and 119 transitions. [2024-09-12 16:43:40,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 16:43:40,458 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 [2024-09-12 16:43:40,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:43:40,459 INFO L225 Difference]: With dead ends: 113 [2024-09-12 16:43:40,459 INFO L226 Difference]: Without dead ends: 93 [2024-09-12 16:43:40,460 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-09-12 16:43:40,460 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 18 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 23 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.7s IncrementalHoareTripleChecker+Time [2024-09-12 16:43:40,460 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 68 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 156 Invalid, 3 Unknown, 0 Unchecked, 0.7s Time] [2024-09-12 16:43:40,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-09-12 16:43:40,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2024-09-12 16:43:40,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 61 states have internal predecessors, (62), 17 states have call successors, (17), 15 states have call predecessors, (17), 16 states have return successors, (20), 16 states have call predecessors, (20), 15 states have call successors, (20) [2024-09-12 16:43:40,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2024-09-12 16:43:40,496 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 46 [2024-09-12 16:43:40,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:43:40,496 INFO L474 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2024-09-12 16:43:40,496 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) [2024-09-12 16:43:40,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:43:40,497 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2024-09-12 16:43:40,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-12 16:43:40,498 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:43:40,498 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] [2024-09-12 16:43:40,519 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-12 16:43:40,699 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 [2024-09-12 16:43:40,699 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:43:40,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:43:40,700 INFO L85 PathProgramCache]: Analyzing trace with hash 15363389, now seen corresponding path program 1 times [2024-09-12 16:43:40,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:43:40,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662001954] [2024-09-12 16:43:40,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:43:40,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:43:40,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:43:41,482 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:43:41,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:43:41,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:43:41,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:43:42,818 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:43:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:43:42,830 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-12 16:43:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:43:42,837 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-12 16:43:42,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:43:42,843 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 16:43:42,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:43:43,940 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:43:43,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:43:44,142 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-12 16:43:44,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:43:44,149 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-12 16:43:44,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:43:44,159 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-12 16:43:44,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:43:44,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662001954] [2024-09-12 16:43:44,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662001954] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:43:44,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749927688] [2024-09-12 16:43:44,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:43:44,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:43:44,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:43:44,162 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) [2024-09-12 16:43:44,164 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-12 16:43:44,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:43:44,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-09-12 16:43:44,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:43:44,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-12 16:43:44,311 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 [2024-09-12 16:43:46,952 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 [2024-09-12 16:43:46,975 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 [2024-09-12 16:43:47,305 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 16:43:47,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:43:49,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749927688] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:43:49,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:43:49,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2024-09-12 16:43:49,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282856300] [2024-09-12 16:43:49,343 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:43:49,343 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-12 16:43:49,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:43:49,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-12 16:43:49,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2024-09-12 16:43:49,344 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand has 28 states, 20 states have (on average 2.3) internal successors, (46), 24 states have internal predecessors, (46), 14 states have call successors, (20), 6 states have call predecessors, (20), 7 states have return successors, (17), 10 states have call predecessors, (17), 13 states have call successors, (17) [2024-09-12 16:43:53,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:43:53,136 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2024-09-12 16:43:53,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-12 16:43:53,136 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 20 states have (on average 2.3) internal successors, (46), 24 states have internal predecessors, (46), 14 states have call successors, (20), 6 states have call predecessors, (20), 7 states have return successors, (17), 10 states have call predecessors, (17), 13 states have call successors, (17) Word has length 58 [2024-09-12 16:43:53,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:43:53,138 INFO L225 Difference]: With dead ends: 102 [2024-09-12 16:43:53,138 INFO L226 Difference]: Without dead ends: 100 [2024-09-12 16:43:53,138 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=262, Invalid=1718, Unknown=0, NotChecked=0, Total=1980 [2024-09-12 16:43:53,139 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 54 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-09-12 16:43:53,139 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 98 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-09-12 16:43:53,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-09-12 16:43:53,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2024-09-12 16:43:53,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 65 states have internal predecessors, (66), 18 states have call successors, (18), 16 states have call predecessors, (18), 17 states have return successors, (21), 17 states have call predecessors, (21), 16 states have call successors, (21) [2024-09-12 16:43:53,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 105 transitions. [2024-09-12 16:43:53,174 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 105 transitions. Word has length 58 [2024-09-12 16:43:53,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:43:53,174 INFO L474 AbstractCegarLoop]: Abstraction has 99 states and 105 transitions. [2024-09-12 16:43:53,175 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 20 states have (on average 2.3) internal successors, (46), 24 states have internal predecessors, (46), 14 states have call successors, (20), 6 states have call predecessors, (20), 7 states have return successors, (17), 10 states have call predecessors, (17), 13 states have call successors, (17) [2024-09-12 16:43:53,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:43:53,175 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 105 transitions. [2024-09-12 16:43:53,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-12 16:43:53,176 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:43:53,176 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] [2024-09-12 16:43:53,189 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-12 16:43:53,376 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 [2024-09-12 16:43:53,377 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:43:53,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:43:53,377 INFO L85 PathProgramCache]: Analyzing trace with hash 765303396, now seen corresponding path program 1 times [2024-09-12 16:43:53,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:43:53,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080985835] [2024-09-12 16:43:53,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:43:53,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:43:53,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:43:53,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [900371087] [2024-09-12 16:43:53,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:43:53,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:43:53,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:43:53,415 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) [2024-09-12 16:43:53,418 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-12 16:43:53,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:43:53,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-09-12 16:43:53,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:43:53,545 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 [2024-09-12 16:43:53,560 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 [2024-09-12 16:43:54,757 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 [2024-09-12 16:43:56,159 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 [2024-09-12 16:43:56,191 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 [2024-09-12 16:43:56,961 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 28 proven. 69 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 16:43:56,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:43:59,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 69 [2024-09-12 16:44:01,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2024-09-12 16:44:01,407 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 46 treesize of output 22 [2024-09-12 16:44:06,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:44:06,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080985835] [2024-09-12 16:44:06,238 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:44:06,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900371087] [2024-09-12 16:44:06,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900371087] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:44:06,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:44:06,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-12 16:44:06,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313580170] [2024-09-12 16:44:06,238 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 16:44:06,239 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-12 16:44:06,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:44:06,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-12 16:44:06,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=664, Unknown=1, NotChecked=0, Total=756 [2024-09-12 16:44:06,240 INFO L87 Difference]: Start difference. First operand 99 states and 105 transitions. Second operand has 22 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 19 states have internal predecessors, (35), 10 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (10), 6 states have call predecessors, (10), 9 states have call successors, (10) [2024-09-12 16:44:11,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:44:11,047 INFO L93 Difference]: Finished difference Result 115 states and 120 transitions. [2024-09-12 16:44:11,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-12 16:44:11,047 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 19 states have internal predecessors, (35), 10 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (10), 6 states have call predecessors, (10), 9 states have call successors, (10) Word has length 64 [2024-09-12 16:44:11,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:44:11,048 INFO L225 Difference]: With dead ends: 115 [2024-09-12 16:44:11,048 INFO L226 Difference]: Without dead ends: 111 [2024-09-12 16:44:11,049 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 52 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=321, Invalid=1934, Unknown=1, NotChecked=0, Total=2256 [2024-09-12 16:44:11,049 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 43 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 53 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:44:11,050 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 76 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 473 Invalid, 4 Unknown, 0 Unchecked, 2.1s Time] [2024-09-12 16:44:11,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-09-12 16:44:11,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2024-09-12 16:44:11,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 70 states have (on average 1.042857142857143) internal successors, (73), 71 states have internal predecessors, (73), 20 states have call successors, (20), 18 states have call predecessors, (20), 18 states have return successors, (22), 19 states have call predecessors, (22), 17 states have call successors, (22) [2024-09-12 16:44:11,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2024-09-12 16:44:11,104 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 64 [2024-09-12 16:44:11,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:44:11,104 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2024-09-12 16:44:11,105 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 19 states have internal predecessors, (35), 10 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (10), 6 states have call predecessors, (10), 9 states have call successors, (10) [2024-09-12 16:44:11,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:44:11,105 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2024-09-12 16:44:11,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-12 16:44:11,108 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:44:11,108 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] [2024-09-12 16:44:11,128 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-12 16:44:11,309 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 [2024-09-12 16:44:11,309 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:44:11,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:44:11,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1393874761, now seen corresponding path program 1 times [2024-09-12 16:44:11,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:44:11,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919938671] [2024-09-12 16:44:11,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:44:11,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:44:11,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:44:11,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1819871707] [2024-09-12 16:44:11,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:44:11,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:44:11,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:44:11,355 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) [2024-09-12 16:44:11,356 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-12 16:44:11,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:44:11,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-09-12 16:44:11,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:44:11,479 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 [2024-09-12 16:44:11,503 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 [2024-09-12 16:44:12,855 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 [2024-09-12 16:44:13,274 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 [2024-09-12 16:44:13,291 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 [2024-09-12 16:44:14,811 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 39 proven. 80 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 16:44:14,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:44:19,966 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 [2024-09-12 16:44:20,974 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 [2024-09-12 16:44:21,411 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 15 [2024-09-12 16:44:21,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 16:44:21,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:44:21,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919938671] [2024-09-12 16:44:21,759 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:44:21,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819871707] [2024-09-12 16:44:21,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819871707] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:44:21,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:44:21,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-12 16:44:21,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332633306] [2024-09-12 16:44:21,760 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 16:44:21,760 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-12 16:44:21,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:44:21,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-12 16:44:21,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=768, Unknown=1, NotChecked=0, Total=870 [2024-09-12 16:44:21,761 INFO L87 Difference]: Start difference. First operand 109 states and 115 transitions. Second operand has 22 states, 17 states have (on average 2.176470588235294) internal successors, (37), 19 states have internal predecessors, (37), 9 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (11), 6 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-12 16:44:26,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:44:26,443 INFO L93 Difference]: Finished difference Result 111 states and 116 transitions. [2024-09-12 16:44:26,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-12 16:44:26,444 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 2.176470588235294) internal successors, (37), 19 states have internal predecessors, (37), 9 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (11), 6 states have call predecessors, (11), 8 states have call successors, (11) Word has length 70 [2024-09-12 16:44:26,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:44:26,445 INFO L225 Difference]: With dead ends: 111 [2024-09-12 16:44:26,445 INFO L226 Difference]: Without dead ends: 89 [2024-09-12 16:44:26,446 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=336, Invalid=2213, Unknown=1, NotChecked=0, Total=2550 [2024-09-12 16:44:26,447 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 34 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 30 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-12 16:44:26,447 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 103 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 486 Invalid, 6 Unknown, 0 Unchecked, 2.0s Time] [2024-09-12 16:44:26,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-09-12 16:44:26,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2024-09-12 16:44:26,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 58 states have internal predecessors, (59), 17 states have call successors, (17), 15 states have call predecessors, (17), 14 states have return successors, (18), 15 states have call predecessors, (18), 15 states have call successors, (18) [2024-09-12 16:44:26,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2024-09-12 16:44:26,488 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 70 [2024-09-12 16:44:26,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:44:26,489 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2024-09-12 16:44:26,489 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 2.176470588235294) internal successors, (37), 19 states have internal predecessors, (37), 9 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (11), 6 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-12 16:44:26,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:44:26,489 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2024-09-12 16:44:26,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-12 16:44:26,490 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:44:26,490 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] [2024-09-12 16:44:26,504 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-12 16:44:26,690 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 [2024-09-12 16:44:26,691 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:44:26,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:44:26,691 INFO L85 PathProgramCache]: Analyzing trace with hash 657256540, now seen corresponding path program 2 times [2024-09-12 16:44:26,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:44:26,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859433772] [2024-09-12 16:44:26,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:44:26,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:44:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:44:27,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:44:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:44:27,882 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:44:27,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:44:29,108 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:44:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:44:29,116 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-12 16:44:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:44:29,124 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-12 16:44:29,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:44:29,132 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 16:44:29,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:44:29,958 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:44:29,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:44:29,963 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-12 16:44:29,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:44:29,968 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-12 16:44:29,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:44:29,975 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 16:44:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:44:30,812 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:44:30,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:44:30,818 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-12 16:44:30,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:44:30,821 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-12 16:44:30,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:44:30,825 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 31 proven. 16 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2024-09-12 16:44:30,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:44:30,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859433772] [2024-09-12 16:44:30,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859433772] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:44:30,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273360849] [2024-09-12 16:44:30,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 16:44:30,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:44:30,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:44:30,828 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) [2024-09-12 16:44:30,829 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-12 16:44:30,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 16:44:30,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:44:30,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-09-12 16:44:30,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:44:30,978 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 [2024-09-12 16:44:31,004 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 [2024-09-12 16:44:32,570 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 [2024-09-12 16:44:32,587 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 [2024-09-12 16:44:33,003 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-09-12 16:44:33,003 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:44:35,022 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 16 treesize of output 12 [2024-09-12 16:44:35,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2024-09-12 16:44:35,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273360849] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:44:35,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:44:35,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 25 [2024-09-12 16:44:35,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221165274] [2024-09-12 16:44:35,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:44:35,487 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-12 16:44:35,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:44:35,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-12 16:44:35,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2024-09-12 16:44:35,488 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand has 25 states, 17 states have (on average 2.411764705882353) internal successors, (41), 20 states have internal predecessors, (41), 14 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (19), 11 states have call predecessors, (19), 12 states have call successors, (19) [2024-09-12 16:44:38,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:44:38,357 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2024-09-12 16:44:38,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-12 16:44:38,358 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 17 states have (on average 2.411764705882353) internal successors, (41), 20 states have internal predecessors, (41), 14 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (19), 11 states have call predecessors, (19), 12 states have call successors, (19) Word has length 82 [2024-09-12 16:44:38,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:44:38,359 INFO L225 Difference]: With dead ends: 100 [2024-09-12 16:44:38,359 INFO L226 Difference]: Without dead ends: 98 [2024-09-12 16:44:38,359 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2024-09-12 16:44:38,360 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 36 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-09-12 16:44:38,360 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 128 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-09-12 16:44:38,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-09-12 16:44:38,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2024-09-12 16:44:38,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 61 states have internal predecessors, (62), 17 states have call successors, (17), 16 states have call predecessors, (17), 15 states have return successors, (18), 15 states have call predecessors, (18), 15 states have call successors, (18) [2024-09-12 16:44:38,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2024-09-12 16:44:38,407 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 82 [2024-09-12 16:44:38,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:44:38,407 INFO L474 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2024-09-12 16:44:38,407 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 17 states have (on average 2.411764705882353) internal successors, (41), 20 states have internal predecessors, (41), 14 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (19), 11 states have call predecessors, (19), 12 states have call successors, (19) [2024-09-12 16:44:38,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:44:38,408 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2024-09-12 16:44:38,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-12 16:44:38,408 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:44:38,409 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] [2024-09-12 16:44:38,422 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-12 16:44:38,609 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 [2024-09-12 16:44:38,609 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:44:38,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:44:38,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1385368131, now seen corresponding path program 2 times [2024-09-12 16:44:38,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:44:38,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697173920] [2024-09-12 16:44:38,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:44:38,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:44:38,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:44:38,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1268699705] [2024-09-12 16:44:38,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 16:44:38,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:44:38,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:44:38,640 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) [2024-09-12 16:44:38,641 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-12 16:44:38,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 16:44:38,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:44:38,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 143 conjuncts are in the unsatisfiable core [2024-09-12 16:44:38,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:44:38,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-12 16:44:38,859 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 [2024-09-12 16:44:44,327 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 [2024-09-12 16:44:49,810 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 [2024-09-12 16:44:54,902 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_func_to_recursive_line_29_to_40_0_#in~s.offset_BEFORE_CALL_24| Int) (|v_func_to_recursive_line_29_to_40_0_#in~s.base_BEFORE_CALL_24| Int) (|v_func_to_recursive_line_29_to_40_0_#in~a.base_BEFORE_CALL_38| Int) (|v_func_to_recursive_line_29_to_40_0_#in~a.offset_BEFORE_CALL_38| Int)) (<= (select (select |c_#memory_int#4| |v_func_to_recursive_line_29_to_40_0_#in~s.base_BEFORE_CALL_24|) |v_func_to_recursive_line_29_to_40_0_#in~s.offset_BEFORE_CALL_24|) (let ((.cse0 (select (select |c_#memory_int#3| |v_func_to_recursive_line_29_to_40_0_#in~a.base_BEFORE_CALL_38|) |v_func_to_recursive_line_29_to_40_0_#in~a.offset_BEFORE_CALL_38|))) (+ (* 2 .cse0) (* .cse0 .cse0) 1)))) is different from true [2024-09-12 16:44:55,194 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 33 treesize of output 25 [2024-09-12 16:45:03,750 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 [2024-09-12 16:45:03,776 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 [2024-09-12 16:45:12,790 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 56 proven. 114 refuted. 8 times theorem prover too weak. 25 trivial. 31 not checked. [2024-09-12 16:45:12,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:45:16,319 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 [2024-09-12 16:45:16,333 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 [2024-09-12 16:45:18,444 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 31 treesize of output 23 [2024-09-12 16:45:18,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:45:18,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697173920] [2024-09-12 16:45:18,784 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:45:18,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268699705] [2024-09-12 16:45:18,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268699705] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:45:18,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:45:18,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2024-09-12 16:45:18,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394558094] [2024-09-12 16:45:18,785 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 16:45:18,785 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-12 16:45:18,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:45:18,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-12 16:45:18,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=879, Unknown=6, NotChecked=60, Total=1056 [2024-09-12 16:45:18,786 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 28 states, 21 states have (on average 2.142857142857143) internal successors, (45), 25 states have internal predecessors, (45), 13 states have call successors, (16), 8 states have call predecessors, (16), 9 states have return successors, (14), 8 states have call predecessors, (14), 12 states have call successors, (14) [2024-09-12 16:45:25,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:45:25,863 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2024-09-12 16:45:25,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-12 16:45:25,864 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 21 states have (on average 2.142857142857143) internal successors, (45), 25 states have internal predecessors, (45), 13 states have call successors, (16), 8 states have call predecessors, (16), 9 states have return successors, (14), 8 states have call predecessors, (14), 12 states have call successors, (14) Word has length 88 [2024-09-12 16:45:25,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:45:25,865 INFO L225 Difference]: With dead ends: 117 [2024-09-12 16:45:25,865 INFO L226 Difference]: Without dead ends: 113 [2024-09-12 16:45:25,866 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 63 SyntacticMatches, 10 SemanticMatches, 58 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 36.7s TimeCoverageRelationStatistics Valid=448, Invalid=2969, Unknown=9, NotChecked=114, Total=3540 [2024-09-12 16:45:25,866 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 54 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 50 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-09-12 16:45:25,867 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 101 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 735 Invalid, 7 Unknown, 65 Unchecked, 2.9s Time] [2024-09-12 16:45:25,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-09-12 16:45:25,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2024-09-12 16:45:25,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 20 states have call successors, (20), 19 states have call predecessors, (20), 18 states have return successors, (23), 19 states have call predecessors, (23), 17 states have call successors, (23) [2024-09-12 16:45:25,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 117 transitions. [2024-09-12 16:45:25,930 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 117 transitions. Word has length 88 [2024-09-12 16:45:25,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:45:25,930 INFO L474 AbstractCegarLoop]: Abstraction has 111 states and 117 transitions. [2024-09-12 16:45:25,930 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 21 states have (on average 2.142857142857143) internal successors, (45), 25 states have internal predecessors, (45), 13 states have call successors, (16), 8 states have call predecessors, (16), 9 states have return successors, (14), 8 states have call predecessors, (14), 12 states have call successors, (14) [2024-09-12 16:45:25,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:45:25,931 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 117 transitions. [2024-09-12 16:45:25,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-12 16:45:25,932 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:45:25,932 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:45:25,945 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-12 16:45:26,132 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 [2024-09-12 16:45:26,132 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:45:26,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:45:26,133 INFO L85 PathProgramCache]: Analyzing trace with hash -42363038, now seen corresponding path program 3 times [2024-09-12 16:45:26,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:45:26,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686128781] [2024-09-12 16:45:26,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:45:26,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:45:26,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:45:26,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1068060401] [2024-09-12 16:45:26,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 16:45:26,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:45:26,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:45:26,160 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) [2024-09-12 16:45:26,161 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-12 16:45:26,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-12 16:45:26,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:45:26,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 181 conjuncts are in the unsatisfiable core [2024-09-12 16:45:26,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:45:26,491 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 [2024-09-12 16:45:26,526 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 [2024-09-12 16:45:26,542 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 [2024-09-12 16:45:30,020 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 [2024-09-12 16:45:30,045 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 [2024-09-12 16:45:30,698 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 72 proven. 40 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2024-09-12 16:45:30,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:45:36,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-09-12 16:45:50,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:45:50,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686128781] [2024-09-12 16:45:50,412 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:45:50,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068060401] [2024-09-12 16:45:50,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068060401] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:45:50,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:45:50,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-12 16:45:50,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996740396] [2024-09-12 16:45:50,413 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 16:45:50,413 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-12 16:45:50,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:45:50,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-12 16:45:50,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2024-09-12 16:45:50,414 INFO L87 Difference]: Start difference. First operand 111 states and 117 transitions. Second operand has 16 states, 12 states have (on average 2.5) internal successors, (30), 15 states have internal predecessors, (30), 8 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-12 16:45:53,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:45:53,306 INFO L93 Difference]: Finished difference Result 135 states and 142 transitions. [2024-09-12 16:45:53,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-12 16:45:53,306 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.5) internal successors, (30), 15 states have internal predecessors, (30), 8 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 112 [2024-09-12 16:45:53,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:45:53,307 INFO L225 Difference]: With dead ends: 135 [2024-09-12 16:45:53,308 INFO L226 Difference]: Without dead ends: 131 [2024-09-12 16:45:53,308 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 107 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2024-09-12 16:45:53,308 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 19 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 12 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-09-12 16:45:53,308 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 128 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 495 Invalid, 3 Unknown, 0 Unchecked, 2.3s Time] [2024-09-12 16:45:53,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-09-12 16:45:53,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 113. [2024-09-12 16:45:53,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 20 states have call successors, (20), 19 states have call predecessors, (20), 19 states have return successors, (26), 20 states have call predecessors, (26), 17 states have call successors, (26) [2024-09-12 16:45:53,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 121 transitions. [2024-09-12 16:45:53,362 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 121 transitions. Word has length 112 [2024-09-12 16:45:53,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:45:53,362 INFO L474 AbstractCegarLoop]: Abstraction has 113 states and 121 transitions. [2024-09-12 16:45:53,362 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.5) internal successors, (30), 15 states have internal predecessors, (30), 8 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-12 16:45:53,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:45:53,362 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 121 transitions. [2024-09-12 16:45:53,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-09-12 16:45:53,363 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:45:53,363 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:45:53,377 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-12 16:45:53,564 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-12 16:45:53,564 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:45:53,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:45:53,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1115426367, now seen corresponding path program 4 times [2024-09-12 16:45:53,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:45:53,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525624736] [2024-09-12 16:45:53,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:45:53,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:45:53,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:45:53,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912076959] [2024-09-12 16:45:53,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 16:45:53,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:45:53,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:45:53,621 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:45:53,624 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-12 16:45:53,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 16:45:53,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:45:53,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 150 conjuncts are in the unsatisfiable core [2024-09-12 16:45:53,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:45:55,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-12 16:45:55,752 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 [2024-09-12 16:45:55,761 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 [2024-09-12 16:45:57,806 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 16:45:57,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2024-09-12 16:45:58,363 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 41 treesize of output 21 [2024-09-12 16:45:58,374 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 22 treesize of output 14 [2024-09-12 16:45:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 339 proven. 89 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2024-09-12 16:45:58,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:46:05,072 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 16:46:05,072 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 140 treesize of output 99 [2024-09-12 16:46:05,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 90 [2024-09-12 16:46:05,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2024-09-12 16:46:07,420 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 16:46:07,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 107 [2024-09-12 16:46:07,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 90 [2024-09-12 16:46:07,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2024-09-12 16:46:09,186 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 16:46:09,186 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 140 treesize of output 99 [2024-09-12 16:46:09,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 90 [2024-09-12 16:46:09,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2024-09-12 16:46:14,283 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_old(#memory_int#3)| |c_func_to_recursive_line_29_to_40_0_#in~a.base|) |c_func_to_recursive_line_29_to_40_0_#in~a.offset|))) (let ((.cse0 (forall ((|v_func_to_recursive_line_29_to_40_0_#in~s.offset_BEFORE_CALL_60| Int) (|v_func_to_recursive_line_29_to_40_0_#in~s.base_BEFORE_CALL_60| Int) (|v_func_to_recursive_line_29_to_40_0_#in~a.base_BEFORE_CALL_74| Int) (|v_func_to_recursive_line_29_to_40_0_#in~a.offset_BEFORE_CALL_74| Int)) (= (select (select |c_#memory_int#4| |v_func_to_recursive_line_29_to_40_0_#in~s.base_BEFORE_CALL_60|) |v_func_to_recursive_line_29_to_40_0_#in~s.offset_BEFORE_CALL_60|) (let ((.cse5 (select (select |c_#memory_int#3| |v_func_to_recursive_line_29_to_40_0_#in~a.base_BEFORE_CALL_74|) |v_func_to_recursive_line_29_to_40_0_#in~a.offset_BEFORE_CALL_74|))) (+ (* 2 .cse5) (* .cse5 .cse5) 1))))) (.cse1 (* 2 .cse2))) (and (or .cse0 (= (+ 1 .cse1 (* .cse2 .cse2)) (select (select |c_old(#memory_int#4)| |c_func_to_recursive_line_29_to_40_0_#in~s.base|) |c_func_to_recursive_line_29_to_40_0_#in~s.offset|))) (or .cse0 (= (+ 1 .cse1) (select (select |c_old(#memory_int#2)| |c_func_to_recursive_line_29_to_40_0_#in~t.base|) |c_func_to_recursive_line_29_to_40_0_#in~t.offset|))) (forall ((|v_func_to_recursive_line_29_to_40_0_#in~s.offset_BEFORE_CALL_60| Int) (|v_func_to_recursive_line_29_to_40_0_#in~s.base_BEFORE_CALL_60| Int) (|v_func_to_recursive_line_29_to_40_0_#in~a.base_BEFORE_CALL_74| Int) (|v_func_to_recursive_line_29_to_40_0_#in~a.offset_BEFORE_CALL_74| Int)) (or (= (select (select |c_#memory_int#4| |v_func_to_recursive_line_29_to_40_0_#in~s.base_BEFORE_CALL_60|) |v_func_to_recursive_line_29_to_40_0_#in~s.offset_BEFORE_CALL_60|) (let ((.cse3 (select (select |c_#memory_int#3| |v_func_to_recursive_line_29_to_40_0_#in~a.base_BEFORE_CALL_74|) |v_func_to_recursive_line_29_to_40_0_#in~a.offset_BEFORE_CALL_74|))) (+ (* 2 .cse3) (* .cse3 .cse3) 1))) (not (= (let ((.cse4 (select (select |c_old(#memory_int#3)| |v_func_to_recursive_line_29_to_40_0_#in~a.base_BEFORE_CALL_74|) |v_func_to_recursive_line_29_to_40_0_#in~a.offset_BEFORE_CALL_74|))) (+ (* .cse4 .cse4) (* .cse4 2) 1)) (select (select |c_old(#memory_int#4)| |v_func_to_recursive_line_29_to_40_0_#in~s.base_BEFORE_CALL_60|) |v_func_to_recursive_line_29_to_40_0_#in~s.offset_BEFORE_CALL_60|)))))))) is different from false [2024-09-12 16:46:14,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:46:14,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525624736] [2024-09-12 16:46:14,545 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:46:14,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912076959] [2024-09-12 16:46:14,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912076959] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:46:14,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:46:14,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-12 16:46:14,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882591396] [2024-09-12 16:46:14,547 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 16:46:14,547 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-12 16:46:14,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:46:14,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-12 16:46:14,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=560, Unknown=3, NotChecked=48, Total=702 [2024-09-12 16:46:14,548 INFO L87 Difference]: Start difference. First operand 113 states and 121 transitions. Second operand has 24 states, 20 states have (on average 2.5) internal successors, (50), 21 states have internal predecessors, (50), 10 states have call successors, (20), 6 states have call predecessors, (20), 8 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) [2024-09-12 16:46:18,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:46:18,968 INFO L93 Difference]: Finished difference Result 119 states and 126 transitions. [2024-09-12 16:46:18,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-12 16:46:18,969 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 2.5) internal successors, (50), 21 states have internal predecessors, (50), 10 states have call successors, (20), 6 states have call predecessors, (20), 8 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) Word has length 136 [2024-09-12 16:46:18,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:46:18,970 INFO L225 Difference]: With dead ends: 119 [2024-09-12 16:46:18,970 INFO L226 Difference]: Without dead ends: 115 [2024-09-12 16:46:18,970 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 134 SyntacticMatches, 8 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=280, Invalid=1361, Unknown=3, NotChecked=78, Total=1722 [2024-09-12 16:46:18,971 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 56 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-09-12 16:46:18,971 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 81 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-09-12 16:46:18,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-09-12 16:46:19,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 95. [2024-09-12 16:46:19,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (18), 15 states have call predecessors, (18), 15 states have call successors, (18) [2024-09-12 16:46:19,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2024-09-12 16:46:19,034 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 136 [2024-09-12 16:46:19,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:46:19,034 INFO L474 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2024-09-12 16:46:19,034 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 2.5) internal successors, (50), 21 states have internal predecessors, (50), 10 states have call successors, (20), 6 states have call predecessors, (20), 8 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) [2024-09-12 16:46:19,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:46:19,035 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2024-09-12 16:46:19,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-09-12 16:46:19,035 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:46:19,036 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] [2024-09-12 16:46:19,054 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-12 16:46:19,236 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-12 16:46:19,236 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:46:19,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:46:19,237 INFO L85 PathProgramCache]: Analyzing trace with hash 344499176, now seen corresponding path program 2 times [2024-09-12 16:46:19,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:46:19,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475468232] [2024-09-12 16:46:19,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:46:19,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:46:19,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:46:19,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1041057620] [2024-09-12 16:46:19,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 16:46:19,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:46:19,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:46:19,262 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:46:19,264 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-12 16:46:19,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 16:46:19,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:46:19,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 165 conjuncts are in the unsatisfiable core [2024-09-12 16:46:19,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:46:19,484 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 [2024-09-12 16:46:19,503 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 [2024-09-12 16:46:19,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-12 16:46:24,426 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_func_to_recursive_line_29_to_40_0_#in~a.offset_BEFORE_CALL_76| Int) (|v_func_to_recursive_line_29_to_40_0_#in~t.base_BEFORE_CALL_48| Int) (|v_func_to_recursive_line_29_to_40_0_#in~a.base_BEFORE_CALL_76| Int) (|v_func_to_recursive_line_29_to_40_0_#in~t.offset_BEFORE_CALL_32| Int)) (<= (select (select |c_#memory_int#2| |v_func_to_recursive_line_29_to_40_0_#in~t.base_BEFORE_CALL_48|) |v_func_to_recursive_line_29_to_40_0_#in~t.offset_BEFORE_CALL_32|) (+ (* (select (select |c_#memory_int#3| |v_func_to_recursive_line_29_to_40_0_#in~a.base_BEFORE_CALL_76|) |v_func_to_recursive_line_29_to_40_0_#in~a.offset_BEFORE_CALL_76|) 2) 1))) is different from true [2024-09-12 16:47:04,338 WARN L293 SmtUtils]: Spent 8.12s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 16:47:12,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-12 16:47:12,529 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 [2024-09-12 16:47:12,558 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