./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-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 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f1d7dc9d 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_cohendiv-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 7c6261a52ba91bad3864c182e4633afd262bc5fe07cf18f92cb66db83623b9ae --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-f1d7dc9-m [2024-09-20 13:12:38,247 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 13:12:38,295 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 13:12:38,298 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 13:12:38,300 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 13:12:38,321 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 13:12:38,323 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 13:12:38,323 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 13:12:38,324 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 13:12:38,326 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 13:12:38,326 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 13:12:38,327 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 13:12:38,327 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 13:12:38,327 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 13:12:38,327 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 13:12:38,328 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 13:12:38,328 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 13:12:38,329 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 13:12:38,329 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 13:12:38,329 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 13:12:38,329 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 13:12:38,330 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 13:12:38,330 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 13:12:38,330 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 13:12:38,330 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 13:12:38,331 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 13:12:38,331 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 13:12:38,331 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 13:12:38,331 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 13:12:38,331 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 13:12:38,332 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 13:12:38,332 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 13:12:38,332 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 13:12:38,332 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 13:12:38,333 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 13:12:38,333 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 13:12:38,333 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 13:12:38,334 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 13:12:38,334 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 13:12:38,334 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 13:12:38,334 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 13:12:38,334 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 13:12:38,334 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c6261a52ba91bad3864c182e4633afd262bc5fe07cf18f92cb66db83623b9ae Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 13:12:38,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 13:12:38,582 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 13:12:38,584 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 13:12:38,585 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 13:12:38,585 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 13:12:38,586 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c [2024-09-20 13:12:39,754 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 13:12:39,891 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 13:12:39,892 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c [2024-09-20 13:12:39,899 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/ecbe43b1c/3cbe6e9a6091403897711eb18336231d/FLAGbcd1669e1 [2024-09-20 13:12:39,910 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/ecbe43b1c/3cbe6e9a6091403897711eb18336231d [2024-09-20 13:12:39,912 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 13:12:39,912 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 13:12:39,913 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 13:12:39,913 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 13:12:39,920 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 13:12:39,920 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:12:39" (1/1) ... [2024-09-20 13:12:39,921 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49142821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:12:39, skipping insertion in model container [2024-09-20 13:12:39,921 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:12:39" (1/1) ... [2024-09-20 13:12:39,939 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 13:12:40,065 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c[1136,1149] [2024-09-20 13:12:40,082 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 13:12:40,096 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 13:12:40,109 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c[1136,1149] [2024-09-20 13:12:40,117 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 13:12:40,129 INFO L204 MainTranslator]: Completed translation [2024-09-20 13:12:40,131 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:12:40 WrapperNode [2024-09-20 13:12:40,131 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 13:12:40,132 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 13:12:40,132 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 13:12:40,132 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 13:12:40,137 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:12:40" (1/1) ... [2024-09-20 13:12:40,144 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:12:40" (1/1) ... [2024-09-20 13:12:40,148 INFO L138 Inliner]: procedures = 17, calls = 84, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 13:12:40,149 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 13:12:40,149 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 13:12:40,149 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 13:12:40,149 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 13:12:40,157 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:12:40" (1/1) ... [2024-09-20 13:12:40,157 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:12:40" (1/1) ... [2024-09-20 13:12:40,164 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:12:40" (1/1) ... [2024-09-20 13:12:40,176 INFO L175 MemorySlicer]: Split 49 memory accesses to 7 slices as follows [10, 2, 8, 8, 6, 10, 5]. 20 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [0, 2, 0, 0, 0, 0, 0]. The 12 writes are split as follows [2, 0, 3, 3, 2, 1, 1]. [2024-09-20 13:12:40,176 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:12:40" (1/1) ... [2024-09-20 13:12:40,176 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:12:40" (1/1) ... [2024-09-20 13:12:40,182 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:12:40" (1/1) ... [2024-09-20 13:12:40,183 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:12:40" (1/1) ... [2024-09-20 13:12:40,184 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:12:40" (1/1) ... [2024-09-20 13:12:40,189 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:12:40" (1/1) ... [2024-09-20 13:12:40,191 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 13:12:40,192 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 13:12:40,192 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 13:12:40,196 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 13:12:40,197 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:12:40" (1/1) ... [2024-09-20 13:12:40,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 13:12:40,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:12:40,223 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) [2024-09-20 13:12:40,228 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 [2024-09-20 13:12:40,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 13:12:40,260 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-20 13:12:40,260 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-20 13:12:40,260 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 13:12:40,260 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 13:12:40,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 13:12:40,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-20 13:12:40,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-20 13:12:40,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-20 13:12:40,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-20 13:12:40,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-20 13:12:40,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-20 13:12:40,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-20 13:12:40,262 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_41_to_52_0 [2024-09-20 13:12:40,262 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_41_to_52_0 [2024-09-20 13:12:40,262 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_32_to_55_0 [2024-09-20 13:12:40,262 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_32_to_55_0 [2024-09-20 13:12:40,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-20 13:12:40,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-20 13:12:40,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-20 13:12:40,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-20 13:12:40,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-20 13:12:40,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-20 13:12:40,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-20 13:12:40,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 13:12:40,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 13:12:40,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 13:12:40,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 13:12:40,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-20 13:12:40,264 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-20 13:12:40,264 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-20 13:12:40,264 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-20 13:12:40,264 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-20 13:12:40,264 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-20 13:12:40,264 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-20 13:12:40,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 13:12:40,264 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 13:12:40,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-20 13:12:40,343 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 13:12:40,344 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 13:12:40,567 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-20 13:12:40,567 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 13:12:40,588 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 13:12:40,588 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-20 13:12:40,588 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:12:40 BoogieIcfgContainer [2024-09-20 13:12:40,588 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 13:12:40,590 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 13:12:40,590 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 13:12:40,593 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 13:12:40,593 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:12:39" (1/3) ... [2024-09-20 13:12:40,593 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16dfb762 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:12:40, skipping insertion in model container [2024-09-20 13:12:40,593 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:12:40" (2/3) ... [2024-09-20 13:12:40,594 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16dfb762 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:12:40, skipping insertion in model container [2024-09-20 13:12:40,595 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:12:40" (3/3) ... [2024-09-20 13:12:40,596 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_cohendiv-ll.c [2024-09-20 13:12:40,607 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 13:12:40,607 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 13:12:40,650 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 13:12:40,656 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;@5332af30, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 13:12:40,656 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 13:12:40,659 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 28 states have (on average 1.25) internal successors, (35), 31 states have internal predecessors, (35), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-20 13:12:40,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-20 13:12:40,665 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:12:40,665 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:12:40,666 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:12:40,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:40,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1731301129, now seen corresponding path program 1 times [2024-09-20 13:12:40,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:12:40,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162182797] [2024-09-20 13:12:40,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:40,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:12:40,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:12:40,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [819382762] [2024-09-20 13:12:40,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:40,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:12:40,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:12:40,828 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) [2024-09-20 13:12:40,830 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 13:12:40,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:40,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-20 13:12:40,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:12:40,977 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 [2024-09-20 13:12:40,986 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 [2024-09-20 13:12:41,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:12:41,096 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 13:12:41,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:12:41,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162182797] [2024-09-20 13:12:41,097 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:12:41,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819382762] [2024-09-20 13:12:41,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819382762] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:12:41,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:12:41,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-20 13:12:41,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127184801] [2024-09-20 13:12:41,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:12:41,103 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 13:12:41,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:12:41,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 13:12:41,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-20 13:12:41,120 INFO L87 Difference]: Start difference. First operand has 50 states, 28 states have (on average 1.25) internal successors, (35), 31 states have internal predecessors, (35), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 13:12:41,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:12:41,301 INFO L93 Difference]: Finished difference Result 108 states and 152 transitions. [2024-09-20 13:12:41,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 13:12:41,307 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), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2024-09-20 13:12:41,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:12:41,312 INFO L225 Difference]: With dead ends: 108 [2024-09-20 13:12:41,313 INFO L226 Difference]: Without dead ends: 61 [2024-09-20 13:12:41,317 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-20 13:12:41,320 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 15 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:12:41,321 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 310 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:12:41,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-09-20 13:12:41,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2024-09-20 13:12:41,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 38 states have internal predecessors, (39), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2024-09-20 13:12:41,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2024-09-20 13:12:41,355 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 18 [2024-09-20 13:12:41,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:12:41,357 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2024-09-20 13:12:41,357 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), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 13:12:41,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:41,358 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2024-09-20 13:12:41,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-20 13:12:41,359 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:12:41,359 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:12:41,375 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 13:12:41,559 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-09-20 13:12:41,560 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:12:41,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:41,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1578239580, now seen corresponding path program 1 times [2024-09-20 13:12:41,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:12:41,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663777273] [2024-09-20 13:12:41,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:41,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:12:41,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:12:41,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [609291049] [2024-09-20 13:12:41,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:41,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:12:41,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:12:41,631 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) [2024-09-20 13:12:41,632 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 13:12:41,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:41,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-20 13:12:41,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:12:41,734 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 [2024-09-20 13:12:41,760 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 [2024-09-20 13:12:41,771 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 [2024-09-20 13:12:41,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:12:41,930 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 [2024-09-20 13:12:41,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-20 13:12:41,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-20 13:12:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:12:41,972 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:12:42,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:12:42,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:12:42,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663777273] [2024-09-20 13:12:42,102 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:12:42,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609291049] [2024-09-20 13:12:42,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609291049] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 13:12:42,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:12:42,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-09-20 13:12:42,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105034791] [2024-09-20 13:12:42,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:12:42,103 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 13:12:42,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:12:42,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 13:12:42,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-20 13:12:42,104 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 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) [2024-09-20 13:12:42,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:12:42,282 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2024-09-20 13:12:42,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 13:12:42,283 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 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 [2024-09-20 13:12:42,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:12:42,284 INFO L225 Difference]: With dead ends: 68 [2024-09-20 13:12:42,284 INFO L226 Difference]: Without dead ends: 66 [2024-09-20 13:12:42,284 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-09-20 13:12:42,285 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 15 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:12:42,285 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 277 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:12:42,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-20 13:12:42,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2024-09-20 13:12:42,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.105263157894737) internal successors, (42), 41 states have internal predecessors, (42), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2024-09-20 13:12:42,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2024-09-20 13:12:42,299 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 24 [2024-09-20 13:12:42,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:12:42,300 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2024-09-20 13:12:42,301 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 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) [2024-09-20 13:12:42,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:42,302 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2024-09-20 13:12:42,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-20 13:12:42,303 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:12:42,304 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:12:42,316 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-20 13:12:42,505 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:12:42,506 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:12:42,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:42,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1582649267, now seen corresponding path program 1 times [2024-09-20 13:12:42,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:12:42,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004805488] [2024-09-20 13:12:42,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:42,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:12:42,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:12:42,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [110837497] [2024-09-20 13:12:42,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:42,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:12:42,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:12:42,580 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:12:42,583 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 13:12:42,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:42,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-20 13:12:42,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:12:42,675 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 [2024-09-20 13:12:42,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:12:42,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:12:42,730 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 [2024-09-20 13:12:42,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-20 13:12:42,760 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 13:12:42,760 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 13:12:42,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:12:42,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004805488] [2024-09-20 13:12:42,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:12:42,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110837497] [2024-09-20 13:12:42,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110837497] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:12:42,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:12:42,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-20 13:12:42,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434947109] [2024-09-20 13:12:42,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:12:42,761 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 13:12:42,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:12:42,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 13:12:42,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-20 13:12:42,785 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-20 13:12:42,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:12:42,948 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2024-09-20 13:12:42,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 13:12:42,949 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2024-09-20 13:12:42,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:12:42,951 INFO L225 Difference]: With dead ends: 84 [2024-09-20 13:12:42,951 INFO L226 Difference]: Without dead ends: 82 [2024-09-20 13:12:42,952 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-20 13:12:42,953 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 19 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:12:42,953 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 266 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:12:42,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-09-20 13:12:42,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2024-09-20 13:12:42,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 51 states have internal predecessors, (53), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2024-09-20 13:12:42,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2024-09-20 13:12:42,967 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 34 [2024-09-20 13:12:42,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:12:42,967 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2024-09-20 13:12:42,967 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-20 13:12:42,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:42,968 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2024-09-20 13:12:42,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-20 13:12:42,969 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:12:42,969 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:12:42,987 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-20 13:12:43,173 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-09-20 13:12:43,174 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:12:43,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:43,174 INFO L85 PathProgramCache]: Analyzing trace with hash -372589770, now seen corresponding path program 1 times [2024-09-20 13:12:43,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:12:43,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311855393] [2024-09-20 13:12:43,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:43,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:12:43,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:12:43,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1453165675] [2024-09-20 13:12:43,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:43,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:12:43,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:12:43,209 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) [2024-09-20 13:12:43,210 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 13:12:43,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:43,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-20 13:12:43,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:12:43,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:12:43,308 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 [2024-09-20 13:12:43,320 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 11 treesize of output 7 [2024-09-20 13:12:43,366 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 [2024-09-20 13:12:43,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-20 13:12:43,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 13:12:43,390 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 13:12:43,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:12:43,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311855393] [2024-09-20 13:12:43,390 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:12:43,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453165675] [2024-09-20 13:12:43,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453165675] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:12:43,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:12:43,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-20 13:12:43,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538857351] [2024-09-20 13:12:43,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:12:43,391 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 13:12:43,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:12:43,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 13:12:43,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-20 13:12:43,394 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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) [2024-09-20 13:12:43,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:12:43,555 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2024-09-20 13:12:43,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 13:12:43,556 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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 [2024-09-20 13:12:43,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:12:43,557 INFO L225 Difference]: With dead ends: 88 [2024-09-20 13:12:43,557 INFO L226 Difference]: Without dead ends: 78 [2024-09-20 13:12:43,558 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-20 13:12:43,559 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 28 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:12:43,560 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 72 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:12:43,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-09-20 13:12:43,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-09-20 13:12:43,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 50 states have internal predecessors, (52), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2024-09-20 13:12:43,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2024-09-20 13:12:43,573 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 34 [2024-09-20 13:12:43,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:12:43,573 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2024-09-20 13:12:43,574 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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) [2024-09-20 13:12:43,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:43,574 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2024-09-20 13:12:43,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-20 13:12:43,575 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:12:43,575 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, 1, 1, 1, 1, 1, 1] [2024-09-20 13:12:43,588 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 13:12:43,778 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:12:43,779 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:12:43,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:43,779 INFO L85 PathProgramCache]: Analyzing trace with hash 316523269, now seen corresponding path program 1 times [2024-09-20 13:12:43,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:12:43,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879207392] [2024-09-20 13:12:43,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:43,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:12:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:12:43,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [221080670] [2024-09-20 13:12:43,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:43,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:12:43,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:12:43,826 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) [2024-09-20 13:12:43,827 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 13:12:43,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:43,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-09-20 13:12:43,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:12:43,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:12:43,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:12:43,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:12:43,942 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 [2024-09-20 13:12:44,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-20 13:12:44,167 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 [2024-09-20 13:12:44,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-20 13:12:44,192 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 13:12:44,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:12:44,335 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 13:12:44,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:12:44,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879207392] [2024-09-20 13:12:44,335 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:12:44,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221080670] [2024-09-20 13:12:44,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221080670] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 13:12:44,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:12:44,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 17 [2024-09-20 13:12:44,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516876269] [2024-09-20 13:12:44,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:12:44,336 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-20 13:12:44,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:12:44,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-20 13:12:44,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2024-09-20 13:12:44,336 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-20 13:12:44,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:12:44,615 INFO L93 Difference]: Finished difference Result 111 states and 132 transitions. [2024-09-20 13:12:44,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-20 13:12:44,615 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 40 [2024-09-20 13:12:44,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:12:44,617 INFO L225 Difference]: With dead ends: 111 [2024-09-20 13:12:44,617 INFO L226 Difference]: Without dead ends: 109 [2024-09-20 13:12:44,617 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2024-09-20 13:12:44,618 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 13:12:44,618 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 271 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 13:12:44,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-09-20 13:12:44,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2024-09-20 13:12:44,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 70 states have internal predecessors, (72), 28 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (29), 25 states have call predecessors, (29), 26 states have call successors, (29) [2024-09-20 13:12:44,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 129 transitions. [2024-09-20 13:12:44,635 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 129 transitions. Word has length 40 [2024-09-20 13:12:44,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:12:44,635 INFO L474 AbstractCegarLoop]: Abstraction has 108 states and 129 transitions. [2024-09-20 13:12:44,635 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-20 13:12:44,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:44,635 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 129 transitions. [2024-09-20 13:12:44,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-20 13:12:44,636 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:12:44,636 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, 1, 1, 1, 1, 1, 1] [2024-09-20 13:12:44,649 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-20 13:12:44,836 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:12:44,838 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:12:44,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:44,839 INFO L85 PathProgramCache]: Analyzing trace with hash -889408325, now seen corresponding path program 1 times [2024-09-20 13:12:44,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:12:44,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664125828] [2024-09-20 13:12:44,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:44,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:12:44,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:45,529 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:12:45,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:45,532 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:12:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:45,564 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 13:12:45,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:45,567 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-20 13:12:45,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:45,569 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-20 13:12:45,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:45,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-20 13:12:45,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 13:12:45,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:12:45,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664125828] [2024-09-20 13:12:45,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664125828] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:12:45,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:12:45,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2024-09-20 13:12:45,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9265250] [2024-09-20 13:12:45,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:12:45,582 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-20 13:12:45,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:12:45,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-20 13:12:45,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2024-09-20 13:12:45,583 INFO L87 Difference]: Start difference. First operand 108 states and 129 transitions. Second operand has 16 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 8 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-20 13:12:45,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:12:45,886 INFO L93 Difference]: Finished difference Result 114 states and 134 transitions. [2024-09-20 13:12:45,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 13:12:45,887 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 8 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 46 [2024-09-20 13:12:45,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:12:45,888 INFO L225 Difference]: With dead ends: 114 [2024-09-20 13:12:45,888 INFO L226 Difference]: Without dead ends: 112 [2024-09-20 13:12:45,889 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2024-09-20 13:12:45,890 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 31 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 13:12:45,890 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 387 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 13:12:45,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-09-20 13:12:45,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2024-09-20 13:12:45,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 73 states have internal predecessors, (75), 28 states have call successors, (28), 15 states have call predecessors, (28), 14 states have return successors, (29), 25 states have call predecessors, (29), 26 states have call successors, (29) [2024-09-20 13:12:45,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 132 transitions. [2024-09-20 13:12:45,915 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 132 transitions. Word has length 46 [2024-09-20 13:12:45,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:12:45,916 INFO L474 AbstractCegarLoop]: Abstraction has 112 states and 132 transitions. [2024-09-20 13:12:45,916 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 8 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-20 13:12:45,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:45,917 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 132 transitions. [2024-09-20 13:12:45,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-20 13:12:45,919 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:12:45,919 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, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:12:45,919 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-20 13:12:45,919 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:12:45,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:45,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1594102023, now seen corresponding path program 1 times [2024-09-20 13:12:45,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:12:45,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766163260] [2024-09-20 13:12:45,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:45,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:12:45,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:12:45,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1736483270] [2024-09-20 13:12:45,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:45,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:12:45,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:12:45,949 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) [2024-09-20 13:12:45,951 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 13:12:46,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:46,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-09-20 13:12:46,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:12:46,053 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 [2024-09-20 13:12:46,138 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 [2024-09-20 13:12:46,143 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 [2024-09-20 13:12:46,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:12:46,510 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 28 treesize of output 16 [2024-09-20 13:12:46,513 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 24 treesize of output 12 [2024-09-20 13:12:46,554 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-20 13:12:46,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:12:46,627 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 [2024-09-20 13:12:46,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:12:46,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766163260] [2024-09-20 13:12:46,666 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:12:46,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736483270] [2024-09-20 13:12:46,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736483270] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:12:46,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:12:46,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-20 13:12:46,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193999105] [2024-09-20 13:12:46,666 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:12:46,667 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-20 13:12:46,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:12:46,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-20 13:12:46,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2024-09-20 13:12:46,668 INFO L87 Difference]: Start difference. First operand 112 states and 132 transitions. Second operand has 17 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 7 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-20 13:12:50,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:12:51,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:12:51,322 INFO L93 Difference]: Finished difference Result 151 states and 175 transitions. [2024-09-20 13:12:51,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-20 13:12:51,323 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 7 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 53 [2024-09-20 13:12:51,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:12:51,324 INFO L225 Difference]: With dead ends: 151 [2024-09-20 13:12:51,324 INFO L226 Difference]: Without dead ends: 149 [2024-09-20 13:12:51,324 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 10 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2024-09-20 13:12:51,325 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 75 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 33 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-09-20 13:12:51,325 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 301 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 565 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2024-09-20 13:12:51,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-09-20 13:12:51,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2024-09-20 13:12:51,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 96 states have internal predecessors, (98), 34 states have call successors, (34), 20 states have call predecessors, (34), 20 states have return successors, (38), 30 states have call predecessors, (38), 31 states have call successors, (38) [2024-09-20 13:12:51,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 170 transitions. [2024-09-20 13:12:51,351 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 170 transitions. Word has length 53 [2024-09-20 13:12:51,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:12:51,352 INFO L474 AbstractCegarLoop]: Abstraction has 145 states and 170 transitions. [2024-09-20 13:12:51,352 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 7 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-20 13:12:51,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:51,352 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 170 transitions. [2024-09-20 13:12:51,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-20 13:12:51,353 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:12:51,353 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:12:51,366 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 13:12:51,557 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:12:51,558 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:12:51,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:51,558 INFO L85 PathProgramCache]: Analyzing trace with hash -161335246, now seen corresponding path program 1 times [2024-09-20 13:12:51,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:12:51,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965199404] [2024-09-20 13:12:51,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:51,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:12:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:12:51,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1049643317] [2024-09-20 13:12:51,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:51,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:12:51,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:12:51,596 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) [2024-09-20 13:12:51,597 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 13:12:51,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:51,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-09-20 13:12:51,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:12:51,717 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 [2024-09-20 13:12:51,794 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 [2024-09-20 13:12:51,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:12:51,816 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 11 treesize of output 7 [2024-09-20 13:12:51,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:12:51,986 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 10 [2024-09-20 13:12:52,021 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 13:12:52,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:12:52,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:12:52,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965199404] [2024-09-20 13:12:52,193 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:12:52,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049643317] [2024-09-20 13:12:52,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049643317] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:12:52,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:12:52,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-20 13:12:52,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915135224] [2024-09-20 13:12:52,194 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:12:52,194 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-20 13:12:52,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:12:52,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-20 13:12:52,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2024-09-20 13:12:52,195 INFO L87 Difference]: Start difference. First operand 145 states and 170 transitions. Second operand has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-20 13:12:56,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:12:56,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:12:56,740 INFO L93 Difference]: Finished difference Result 162 states and 193 transitions. [2024-09-20 13:12:56,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 13:12:56,741 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 59 [2024-09-20 13:12:56,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:12:56,742 INFO L225 Difference]: With dead ends: 162 [2024-09-20 13:12:56,742 INFO L226 Difference]: Without dead ends: 160 [2024-09-20 13:12:56,743 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 12 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2024-09-20 13:12:56,743 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 58 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 46 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-09-20 13:12:56,743 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 209 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 534 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2024-09-20 13:12:56,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-09-20 13:12:56,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2024-09-20 13:12:56,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 97 states have (on average 1.0824742268041236) internal successors, (105), 104 states have internal predecessors, (105), 36 states have call successors, (36), 21 states have call predecessors, (36), 24 states have return successors, (47), 33 states have call predecessors, (47), 33 states have call successors, (47) [2024-09-20 13:12:56,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 188 transitions. [2024-09-20 13:12:56,779 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 188 transitions. Word has length 59 [2024-09-20 13:12:56,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:12:56,781 INFO L474 AbstractCegarLoop]: Abstraction has 158 states and 188 transitions. [2024-09-20 13:12:56,781 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-20 13:12:56,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:56,781 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 188 transitions. [2024-09-20 13:12:56,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-20 13:12:56,782 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:12:56,782 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:12:56,800 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-20 13:12:56,982 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:12:56,983 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:12:56,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:56,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1396822734, now seen corresponding path program 1 times [2024-09-20 13:12:56,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:12:56,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134608417] [2024-09-20 13:12:56,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:56,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:12:57,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:12:57,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [319842763] [2024-09-20 13:12:57,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:57,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:12:57,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:12:57,027 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) [2024-09-20 13:12:57,028 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 13:12:57,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:57,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-09-20 13:12:57,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:12:57,144 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 [2024-09-20 13:12:57,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:12:57,230 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 [2024-09-20 13:12:57,568 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 [2024-09-20 13:12:57,573 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 29 treesize of output 17 [2024-09-20 13:12:57,626 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 28 treesize of output 16 [2024-09-20 13:12:57,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-20 13:12:57,669 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 32 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 13:12:57,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:12:57,823 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-09-20 13:12:57,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:12:57,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134608417] [2024-09-20 13:12:57,823 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:12:57,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319842763] [2024-09-20 13:12:57,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319842763] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:12:57,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 13:12:57,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 22 [2024-09-20 13:12:57,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880970499] [2024-09-20 13:12:57,824 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 13:12:57,824 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-20 13:12:57,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:12:57,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-20 13:12:57,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2024-09-20 13:12:57,825 INFO L87 Difference]: Start difference. First operand 158 states and 188 transitions. Second operand has 22 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 11 states have call successors, (24), 8 states have call predecessors, (24), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-20 13:13:01,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:13:02,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:13:02,704 INFO L93 Difference]: Finished difference Result 204 states and 247 transitions. [2024-09-20 13:13:02,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-20 13:13:02,705 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 11 states have call successors, (24), 8 states have call predecessors, (24), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 62 [2024-09-20 13:13:02,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:13:02,707 INFO L225 Difference]: With dead ends: 204 [2024-09-20 13:13:02,707 INFO L226 Difference]: Without dead ends: 202 [2024-09-20 13:13:02,708 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 93 SyntacticMatches, 12 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=201, Invalid=1359, Unknown=0, NotChecked=0, Total=1560 [2024-09-20 13:13:02,708 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 122 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 68 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-09-20 13:13:02,709 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 381 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 850 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2024-09-20 13:13:02,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-09-20 13:13:02,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 196. [2024-09-20 13:13:02,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 120 states have (on average 1.0833333333333333) internal successors, (130), 127 states have internal predecessors, (130), 44 states have call successors, (44), 24 states have call predecessors, (44), 31 states have return successors, (64), 45 states have call predecessors, (64), 41 states have call successors, (64) [2024-09-20 13:13:02,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 238 transitions. [2024-09-20 13:13:02,762 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 238 transitions. Word has length 62 [2024-09-20 13:13:02,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:13:02,763 INFO L474 AbstractCegarLoop]: Abstraction has 196 states and 238 transitions. [2024-09-20 13:13:02,763 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 11 states have call successors, (24), 8 states have call predecessors, (24), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-20 13:13:02,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:02,763 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 238 transitions. [2024-09-20 13:13:02,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-20 13:13:02,764 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:13:02,764 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:13:02,776 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-20 13:13:02,964 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:13:02,965 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:13:02,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:02,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1851795615, now seen corresponding path program 2 times [2024-09-20 13:13:02,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:13:02,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542908425] [2024-09-20 13:13:02,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:13:02,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:13:02,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:13:02,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1174143632] [2024-09-20 13:13:02,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:13:02,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:13:02,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:13:02,988 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) [2024-09-20 13:13:02,989 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 13:13:03,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 13:13:03,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:13:03,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 139 conjuncts are in the unsatisfiable core [2024-09-20 13:13:03,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:13:03,123 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 [2024-09-20 13:13:03,125 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 [2024-09-20 13:13:03,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:13:03,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:13:03,352 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 [2024-09-20 13:13:03,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:13:03,392 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 11 treesize of output 7 [2024-09-20 13:13:04,516 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-20 13:13:04,516 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 [2024-09-20 13:13:04,526 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 50 treesize of output 38 [2024-09-20 13:13:04,554 INFO L349 Elim1Store]: treesize reduction 22, result has 56.0 percent of original size [2024-09-20 13:13:04,554 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 83 treesize of output 80 [2024-09-20 13:13:05,856 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:13:05,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 124 treesize of output 144 [2024-09-20 13:13:05,894 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:13:05,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 182 treesize of output 206 [2024-09-20 13:13:05,947 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:13:05,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 158 [2024-09-20 13:13:06,193 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-20 13:13:06,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:13:11,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:13:11,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542908425] [2024-09-20 13:13:11,509 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:13:11,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174143632] [2024-09-20 13:13:11,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174143632] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:13:11,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:13:11,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-20 13:13:11,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991475819] [2024-09-20 13:13:11,509 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:13:11,509 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-20 13:13:11,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:13:11,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-20 13:13:11,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2024-09-20 13:13:11,510 INFO L87 Difference]: Start difference. First operand 196 states and 238 transitions. Second operand has 25 states, 20 states have (on average 1.7) internal successors, (34), 18 states have internal predecessors, (34), 8 states have call successors, (13), 8 states have call predecessors, (13), 6 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-20 13:13:20,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:13:21,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:13:21,552 INFO L93 Difference]: Finished difference Result 326 states and 377 transitions. [2024-09-20 13:13:21,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-20 13:13:21,552 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 1.7) internal successors, (34), 18 states have internal predecessors, (34), 8 states have call successors, (13), 8 states have call predecessors, (13), 6 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 65 [2024-09-20 13:13:21,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:13:21,554 INFO L225 Difference]: With dead ends: 326 [2024-09-20 13:13:21,554 INFO L226 Difference]: Without dead ends: 324 [2024-09-20 13:13:21,555 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=341, Invalid=3081, Unknown=0, NotChecked=0, Total=3422 [2024-09-20 13:13:21,555 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 142 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 1147 mSolverCounterSat, 82 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1147 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2024-09-20 13:13:21,555 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 500 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1147 Invalid, 1 Unknown, 0 Unchecked, 7.7s Time] [2024-09-20 13:13:21,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2024-09-20 13:13:21,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 317. [2024-09-20 13:13:21,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 200 states have (on average 1.085) internal successors, (217), 210 states have internal predecessors, (217), 62 states have call successors, (62), 43 states have call predecessors, (62), 54 states have return successors, (91), 64 states have call predecessors, (91), 58 states have call successors, (91) [2024-09-20 13:13:21,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 370 transitions. [2024-09-20 13:13:21,659 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 370 transitions. Word has length 65 [2024-09-20 13:13:21,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:13:21,660 INFO L474 AbstractCegarLoop]: Abstraction has 317 states and 370 transitions. [2024-09-20 13:13:21,661 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 1.7) internal successors, (34), 18 states have internal predecessors, (34), 8 states have call successors, (13), 8 states have call predecessors, (13), 6 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-20 13:13:21,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:21,661 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 370 transitions. [2024-09-20 13:13:21,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-09-20 13:13:21,662 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:13:21,662 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:13:21,676 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-20 13:13:21,866 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-20 13:13:21,867 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:13:21,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:21,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1323270614, now seen corresponding path program 1 times [2024-09-20 13:13:21,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:13:21,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445695011] [2024-09-20 13:13:21,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:13:21,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:13:21,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:13:21,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1468181361] [2024-09-20 13:13:21,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:13:21,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:13:21,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:13:21,896 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) [2024-09-20 13:13:21,897 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 13:13:22,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:22,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 158 conjuncts are in the unsatisfiable core [2024-09-20 13:13:22,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:13:22,026 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 [2024-09-20 13:13:22,028 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 [2024-09-20 13:13:22,050 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 [2024-09-20 13:13:22,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:13:22,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:13:22,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:13:22,316 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 [2024-09-20 13:13:22,360 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 11 treesize of output 7 [2024-09-20 13:13:35,722 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 44 treesize of output 32 [2024-09-20 13:13:35,737 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:13:35,738 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 38 treesize of output 38 [2024-09-20 13:13:44,753 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 44 treesize of output 32 [2024-09-20 13:13:48,918 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 [2024-09-20 13:13:48,958 INFO L349 Elim1Store]: treesize reduction 20, result has 58.3 percent of original size [2024-09-20 13:13:48,958 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 81 treesize of output 73 [2024-09-20 13:13:53,369 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:13:53,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 89 [2024-09-20 13:13:53,470 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:13:53,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 143 treesize of output 279 [2024-09-20 13:13:53,482 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 97 treesize of output 69 [2024-09-20 13:13:53,732 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 34 refuted. 9 times theorem prover too weak. 27 trivial. 0 not checked. [2024-09-20 13:13:53,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:13:55,523 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 52 treesize of output 48 [2024-09-20 13:13:55,535 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 48 treesize of output 36 [2024-09-20 13:13:59,560 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((|v_func_to_recursive_line_32_to_55_0_#in~r.offset_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~y.offset_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~y.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~x.offset_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~r.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~x.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~q.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~q.offset_BEFORE_CALL_7| Int)) (let ((.cse0 (select (select |c_#memory_int#6| |v_func_to_recursive_line_32_to_55_0_#in~x.base_BEFORE_CALL_7|) |v_func_to_recursive_line_32_to_55_0_#in~x.offset_BEFORE_CALL_7|)) (.cse1 (select (select |c_#memory_int#5| |v_func_to_recursive_line_32_to_55_0_#in~y.base_BEFORE_CALL_7|) |v_func_to_recursive_line_32_to_55_0_#in~y.offset_BEFORE_CALL_7|))) (or (not (= .cse0 (+ (select (select |c_old(#memory_int#0)| |v_func_to_recursive_line_32_to_55_0_#in~r.base_BEFORE_CALL_7|) |v_func_to_recursive_line_32_to_55_0_#in~r.offset_BEFORE_CALL_7|) (* .cse1 (select (select |c_old(#memory_int#4)| |v_func_to_recursive_line_32_to_55_0_#in~q.base_BEFORE_CALL_7|) |v_func_to_recursive_line_32_to_55_0_#in~q.offset_BEFORE_CALL_7|))))) (= .cse0 (+ (* (select (select |c_#memory_int#4| |v_func_to_recursive_line_32_to_55_0_#in~q.base_BEFORE_CALL_7|) |v_func_to_recursive_line_32_to_55_0_#in~q.offset_BEFORE_CALL_7|) .cse1) (select (select |c_#memory_int#0| |v_func_to_recursive_line_32_to_55_0_#in~r.base_BEFORE_CALL_7|) |v_func_to_recursive_line_32_to_55_0_#in~r.offset_BEFORE_CALL_7|)))))) (or (forall ((|v_func_to_recursive_line_32_to_55_0_#in~r.offset_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~y.offset_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~y.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~x.offset_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~r.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~x.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~q.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~q.offset_BEFORE_CALL_7| Int)) (= (select (select |c_#memory_int#6| |v_func_to_recursive_line_32_to_55_0_#in~x.base_BEFORE_CALL_7|) |v_func_to_recursive_line_32_to_55_0_#in~x.offset_BEFORE_CALL_7|) (+ (* (select (select |c_#memory_int#4| |v_func_to_recursive_line_32_to_55_0_#in~q.base_BEFORE_CALL_7|) |v_func_to_recursive_line_32_to_55_0_#in~q.offset_BEFORE_CALL_7|) (select (select |c_#memory_int#5| |v_func_to_recursive_line_32_to_55_0_#in~y.base_BEFORE_CALL_7|) |v_func_to_recursive_line_32_to_55_0_#in~y.offset_BEFORE_CALL_7|)) (select (select |c_#memory_int#0| |v_func_to_recursive_line_32_to_55_0_#in~r.base_BEFORE_CALL_7|) |v_func_to_recursive_line_32_to_55_0_#in~r.offset_BEFORE_CALL_7|)))) (< (select (select |c_#memory_int#6| |c_func_to_recursive_line_32_to_55_0_#in~x.base|) |c_func_to_recursive_line_32_to_55_0_#in~x.offset|) (+ (select (select |c_old(#memory_int#0)| |c_func_to_recursive_line_32_to_55_0_#in~r.base|) |c_func_to_recursive_line_32_to_55_0_#in~r.offset|) (* (select (select |c_#memory_int#5| |c_func_to_recursive_line_32_to_55_0_#in~y.base|) |c_func_to_recursive_line_32_to_55_0_#in~y.offset|) (select (select |c_old(#memory_int#4)| |c_func_to_recursive_line_32_to_55_0_#in~q.base|) |c_func_to_recursive_line_32_to_55_0_#in~q.offset|)) 1)))) is different from false [2024-09-20 13:13:59,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:13:59,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445695011] [2024-09-20 13:13:59,719 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:13:59,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468181361] [2024-09-20 13:13:59,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468181361] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:13:59,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:13:59,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2024-09-20 13:13:59,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532209909] [2024-09-20 13:13:59,719 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:13:59,720 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-20 13:13:59,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:13:59,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-20 13:13:59,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1124, Unknown=8, NotChecked=68, Total=1332 [2024-09-20 13:13:59,720 INFO L87 Difference]: Start difference. First operand 317 states and 370 transitions. Second operand has 30 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 10 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-09-20 13:14:03,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:14:07,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:14:16,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:14:20,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:14:24,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:14:30,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:14:34,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:14:38,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:14:42,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-20 13:14:50,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-20 13:14:54,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-20 13:15:03,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:15:07,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:15:11,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:15:15,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:15:20,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:15:24,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-20 13:15:24,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:15:24,406 INFO L93 Difference]: Finished difference Result 347 states and 405 transitions. [2024-09-20 13:15:24,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-20 13:15:24,407 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 10 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) Word has length 77 [2024-09-20 13:15:24,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:15:24,409 INFO L225 Difference]: With dead ends: 347 [2024-09-20 13:15:24,409 INFO L226 Difference]: Without dead ends: 321 [2024-09-20 13:15:24,410 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 48.3s TimeCoverageRelationStatistics Valid=302, Invalid=2661, Unknown=11, NotChecked=106, Total=3080 [2024-09-20 13:15:24,413 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 67 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 59 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 69.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 71.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:15:24,413 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 144 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 998 Invalid, 17 Unknown, 0 Unchecked, 71.1s Time] [2024-09-20 13:15:24,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2024-09-20 13:15:24,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 319. [2024-09-20 13:15:24,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 203 states have (on average 1.0886699507389161) internal successors, (221), 212 states have internal predecessors, (221), 61 states have call successors, (61), 45 states have call predecessors, (61), 54 states have return successors, (86), 61 states have call predecessors, (86), 58 states have call successors, (86) [2024-09-20 13:15:24,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 368 transitions. [2024-09-20 13:15:24,538 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 368 transitions. Word has length 77 [2024-09-20 13:15:24,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:15:24,538 INFO L474 AbstractCegarLoop]: Abstraction has 319 states and 368 transitions. [2024-09-20 13:15:24,538 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 10 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-09-20 13:15:24,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:15:24,538 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 368 transitions. [2024-09-20 13:15:24,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-09-20 13:15:24,539 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:15:24,539 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 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, 1, 1, 1, 1, 1, 1] [2024-09-20 13:15:24,553 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-20 13:15:24,739 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-20 13:15:24,739 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:15:24,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:15:24,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1223510810, now seen corresponding path program 2 times [2024-09-20 13:15:24,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:15:24,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747657346] [2024-09-20 13:15:24,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:15:24,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:15:24,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:15:24,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1792289719] [2024-09-20 13:15:24,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:15:24,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:15:24,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:15:24,781 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) [2024-09-20 13:15:24,782 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 13:15:24,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 13:15:24,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:15:24,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 129 conjuncts are in the unsatisfiable core [2024-09-20 13:15:24,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:15:24,930 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 [2024-09-20 13:15:24,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:15:24,945 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 [2024-09-20 13:15:24,948 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 [2024-09-20 13:15:24,970 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 [2024-09-20 13:15:24,977 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 [2024-09-20 13:15:25,258 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 29 treesize of output 17 [2024-09-20 13:15:25,274 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 [2024-09-20 13:15:25,678 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 30 treesize of output 18 [2024-09-20 13:15:25,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-20 13:15:25,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-20 13:15:25,791 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 60 proven. 72 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 13:15:25,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:15:26,274 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-20 13:15:26,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:15:26,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747657346] [2024-09-20 13:15:26,274 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:15:26,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792289719] [2024-09-20 13:15:26,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792289719] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:15:26,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 13:15:26,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 23 [2024-09-20 13:15:26,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997248546] [2024-09-20 13:15:26,274 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 13:15:26,275 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 13:15:26,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:15:26,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 13:15:26,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2024-09-20 13:15:26,275 INFO L87 Difference]: Start difference. First operand 319 states and 368 transitions. Second operand has 23 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 17 states have internal predecessors, (56), 11 states have call successors, (30), 9 states have call predecessors, (30), 3 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-20 13:15:28,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:15:28,782 INFO L93 Difference]: Finished difference Result 506 states and 595 transitions. [2024-09-20 13:15:28,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-09-20 13:15:28,782 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 17 states have internal predecessors, (56), 11 states have call successors, (30), 9 states have call predecessors, (30), 3 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) Word has length 81 [2024-09-20 13:15:28,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:15:28,785 INFO L225 Difference]: With dead ends: 506 [2024-09-20 13:15:28,785 INFO L226 Difference]: Without dead ends: 504 [2024-09-20 13:15:28,786 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 129 SyntacticMatches, 14 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=299, Invalid=2151, Unknown=0, NotChecked=0, Total=2450 [2024-09-20 13:15:28,786 INFO L434 NwaCegarLoop]: 55 mSDtfsCounter, 131 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-20 13:15:28,786 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 708 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1118 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-20 13:15:28,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2024-09-20 13:15:28,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 478. [2024-09-20 13:15:28,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 302 states have (on average 1.086092715231788) internal successors, (328), 320 states have internal predecessors, (328), 94 states have call successors, (94), 66 states have call predecessors, (94), 81 states have return successors, (131), 91 states have call predecessors, (131), 91 states have call successors, (131) [2024-09-20 13:15:28,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 553 transitions. [2024-09-20 13:15:28,983 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 553 transitions. Word has length 81 [2024-09-20 13:15:28,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:15:28,984 INFO L474 AbstractCegarLoop]: Abstraction has 478 states and 553 transitions. [2024-09-20 13:15:28,984 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 17 states have internal predecessors, (56), 11 states have call successors, (30), 9 states have call predecessors, (30), 3 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-20 13:15:28,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:15:28,984 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 553 transitions. [2024-09-20 13:15:28,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-09-20 13:15:28,985 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:15:28,985 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 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, 1, 1, 1] [2024-09-20 13:15:28,998 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-20 13:15:29,185 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:15:29,185 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:15:29,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:15:29,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1472240640, now seen corresponding path program 3 times [2024-09-20 13:15:29,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:15:29,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629074302] [2024-09-20 13:15:29,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:15:29,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:15:29,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:29,910 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:15:29,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:29,912 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:15:29,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:29,913 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 13:15:29,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:29,915 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-20 13:15:29,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:29,930 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-20 13:15:29,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:30,118 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:15:30,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:30,122 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-20 13:15:30,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:30,127 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 13:15:30,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:30,130 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-20 13:15:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:30,132 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-20 13:15:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:30,138 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-20 13:15:30,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:30,139 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-20 13:15:30,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:15:30,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629074302] [2024-09-20 13:15:30,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629074302] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:15:30,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:15:30,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-09-20 13:15:30,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815210968] [2024-09-20 13:15:30,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:15:30,140 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-20 13:15:30,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:15:30,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-20 13:15:30,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2024-09-20 13:15:30,141 INFO L87 Difference]: Start difference. First operand 478 states and 553 transitions. Second operand has 13 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (11), 5 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-20 13:15:30,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:15:30,889 INFO L93 Difference]: Finished difference Result 651 states and 757 transitions. [2024-09-20 13:15:30,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-20 13:15:30,889 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (11), 5 states have call predecessors, (11), 7 states have call successors, (11) Word has length 81 [2024-09-20 13:15:30,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:15:30,891 INFO L225 Difference]: With dead ends: 651 [2024-09-20 13:15:30,891 INFO L226 Difference]: Without dead ends: 329 [2024-09-20 13:15:30,893 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2024-09-20 13:15:30,893 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 40 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 13:15:30,893 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 168 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 13:15:30,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2024-09-20 13:15:30,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 329. [2024-09-20 13:15:30,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 208 states have (on average 1.0769230769230769) internal successors, (224), 219 states have internal predecessors, (224), 64 states have call successors, (64), 46 states have call predecessors, (64), 56 states have return successors, (84), 63 states have call predecessors, (84), 61 states have call successors, (84) [2024-09-20 13:15:30,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 372 transitions. [2024-09-20 13:15:31,000 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 372 transitions. Word has length 81 [2024-09-20 13:15:31,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:15:31,000 INFO L474 AbstractCegarLoop]: Abstraction has 329 states and 372 transitions. [2024-09-20 13:15:31,001 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (11), 5 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-20 13:15:31,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:15:31,001 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 372 transitions. [2024-09-20 13:15:31,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-09-20 13:15:31,002 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:15:31,002 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:15:31,002 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-09-20 13:15:31,002 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:15:31,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:15:31,003 INFO L85 PathProgramCache]: Analyzing trace with hash -987042471, now seen corresponding path program 1 times [2024-09-20 13:15:31,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:15:31,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720795566] [2024-09-20 13:15:31,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:15:31,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:15:31,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:15:31,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [880195097] [2024-09-20 13:15:31,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:15:31,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:15:31,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:15:31,046 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) [2024-09-20 13:15:31,047 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-20 13:15:31,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:31,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 130 conjuncts are in the unsatisfiable core [2024-09-20 13:15:31,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:15:31,196 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 [2024-09-20 13:15:31,314 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 [2024-09-20 13:15:31,322 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 [2024-09-20 13:15:31,340 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 11 treesize of output 7 [2024-09-20 13:16:37,569 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 29 treesize of output 17 [2024-09-20 13:16:37,589 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 [2024-09-20 13:16:37,756 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 47 treesize of output 31 [2024-09-20 13:16:37,776 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:16:37,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 63 [2024-09-20 13:16:37,891 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 70 proven. 34 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-20 13:16:37,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:16:38,852 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 36 treesize of output 28 [2024-09-20 13:16:38,857 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 28 treesize of output 20 [2024-09-20 13:16:42,874 WARN L854 $PredicateComparison]: unable to prove that (and (or (< (select (select |c_old(#memory_int#2)| |c_func_to_recursive_line_41_to_52_0_#in~b.base|) |c_func_to_recursive_line_41_to_52_0_#in~b.offset|) (+ (* (select (select |c_#memory_int#5| |c_func_to_recursive_line_41_to_52_0_#in~y.base|) |c_func_to_recursive_line_41_to_52_0_#in~y.offset|) (select (select |c_old(#memory_int#3)| |c_func_to_recursive_line_41_to_52_0_#in~a.base|) |c_func_to_recursive_line_41_to_52_0_#in~a.offset|)) 1)) (forall ((|v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_15| Int) (|v_func_to_recursive_line_41_to_52_0_#in~y.base_BEFORE_CALL_9| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_15| Int) (|v_func_to_recursive_line_41_to_52_0_#in~a.base_BEFORE_CALL_9| Int) (|v_func_to_recursive_line_41_to_52_0_#in~a.offset_BEFORE_CALL_9| Int) (|v_func_to_recursive_line_41_to_52_0_#in~y.offset_BEFORE_CALL_9| Int)) (= (* (select (select |c_#memory_int#5| |v_func_to_recursive_line_41_to_52_0_#in~y.base_BEFORE_CALL_9|) |v_func_to_recursive_line_41_to_52_0_#in~y.offset_BEFORE_CALL_9|) (select (select |c_#memory_int#3| |v_func_to_recursive_line_41_to_52_0_#in~a.base_BEFORE_CALL_9|) |v_func_to_recursive_line_41_to_52_0_#in~a.offset_BEFORE_CALL_9|)) (select (select |c_#memory_int#2| |v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_15|) |v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_15|)))) (forall ((|v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_15| Int) (|v_func_to_recursive_line_41_to_52_0_#in~y.base_BEFORE_CALL_9| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_15| Int) (|v_func_to_recursive_line_41_to_52_0_#in~a.base_BEFORE_CALL_9| Int) (|v_func_to_recursive_line_41_to_52_0_#in~a.offset_BEFORE_CALL_9| Int) (|v_func_to_recursive_line_41_to_52_0_#in~y.offset_BEFORE_CALL_9| Int)) (let ((.cse0 (select (select |c_#memory_int#5| |v_func_to_recursive_line_41_to_52_0_#in~y.base_BEFORE_CALL_9|) |v_func_to_recursive_line_41_to_52_0_#in~y.offset_BEFORE_CALL_9|))) (or (= (* .cse0 (select (select |c_#memory_int#3| |v_func_to_recursive_line_41_to_52_0_#in~a.base_BEFORE_CALL_9|) |v_func_to_recursive_line_41_to_52_0_#in~a.offset_BEFORE_CALL_9|)) (select (select |c_#memory_int#2| |v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_15|) |v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_15|)) (not (= (* .cse0 (select (select |c_old(#memory_int#3)| |v_func_to_recursive_line_41_to_52_0_#in~a.base_BEFORE_CALL_9|) |v_func_to_recursive_line_41_to_52_0_#in~a.offset_BEFORE_CALL_9|)) (select (select |c_old(#memory_int#2)| |v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_15|) |v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_15|))))))) is different from false [2024-09-20 13:16:42,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:16:42,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720795566] [2024-09-20 13:16:42,935 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:16:42,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880195097] [2024-09-20 13:16:42,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880195097] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:16:42,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:16:42,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-20 13:16:42,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543676630] [2024-09-20 13:16:42,936 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:16:42,936 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-20 13:16:42,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:16:42,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-20 13:16:42,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=769, Unknown=8, NotChecked=56, Total=930 [2024-09-20 13:16:42,937 INFO L87 Difference]: Start difference. First operand 329 states and 372 transitions. Second operand has 24 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 20 states have internal predecessors, (40), 11 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (13), 7 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-20 13:16:46,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:16:51,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-20 13:16:55,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-20 13:17:05,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:17:05,678 INFO L93 Difference]: Finished difference Result 348 states and 398 transitions. [2024-09-20 13:17:05,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-20 13:17:05,679 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 20 states have internal predecessors, (40), 11 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (13), 7 states have call predecessors, (13), 8 states have call successors, (13) Word has length 89 [2024-09-20 13:17:05,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:17:05,680 INFO L225 Difference]: With dead ends: 348 [2024-09-20 13:17:05,681 INFO L226 Difference]: Without dead ends: 346 [2024-09-20 13:17:05,681 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 59 SyntacticMatches, 17 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 79.3s TimeCoverageRelationStatistics Valid=291, Invalid=2153, Unknown=10, NotChecked=96, Total=2550 [2024-09-20 13:17:05,682 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 78 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 70 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2024-09-20 13:17:05,682 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 273 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1083 Invalid, 3 Unknown, 0 Unchecked, 13.5s Time] [2024-09-20 13:17:05,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2024-09-20 13:17:05,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 344. [2024-09-20 13:17:05,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 218 states have (on average 1.0779816513761469) internal successors, (235), 229 states have internal predecessors, (235), 67 states have call successors, (67), 48 states have call predecessors, (67), 58 states have return successors, (90), 66 states have call predecessors, (90), 64 states have call successors, (90) [2024-09-20 13:17:05,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 392 transitions. [2024-09-20 13:17:05,829 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 392 transitions. Word has length 89 [2024-09-20 13:17:05,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:17:05,830 INFO L474 AbstractCegarLoop]: Abstraction has 344 states and 392 transitions. [2024-09-20 13:17:05,830 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 20 states have internal predecessors, (40), 11 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (13), 7 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-20 13:17:05,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:17:05,832 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 392 transitions. [2024-09-20 13:17:05,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-09-20 13:17:05,833 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:17:05,833 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:17:05,847 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-20 13:17:06,033 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 [2024-09-20 13:17:06,033 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:17:06,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:17:06,034 INFO L85 PathProgramCache]: Analyzing trace with hash -568318842, now seen corresponding path program 2 times [2024-09-20 13:17:06,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:17:06,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769050305] [2024-09-20 13:17:06,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:17:06,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:17:06,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:17:06,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808155839] [2024-09-20 13:17:06,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:17:06,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:17:06,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:17:06,068 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) [2024-09-20 13:17:06,069 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-20 13:17:06,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 13:17:06,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:17:06,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 149 conjuncts are in the unsatisfiable core [2024-09-20 13:17:06,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:17:06,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:17:06,247 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 [2024-09-20 13:17:06,275 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 [2024-09-20 13:17:06,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:17:06,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:17:06,541 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 [2024-09-20 13:17:06,568 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 11 treesize of output 7 [2024-09-20 13:17:07,510 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 29 treesize of output 17 [2024-09-20 13:17:07,525 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 [2024-09-20 13:17:07,614 INFO L349 Elim1Store]: treesize reduction 22, result has 56.0 percent of original size [2024-09-20 13:17:07,615 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 46 treesize of output 55 [2024-09-20 13:17:07,618 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 57 treesize of output 45 [2024-09-20 13:17:07,681 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-20 13:17:07,681 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 [2024-09-20 13:17:08,621 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:17:08,621 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 124 treesize of output 112 [2024-09-20 13:17:08,666 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:17:08,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 142 [2024-09-20 13:17:08,740 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:17:08,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 166 [2024-09-20 13:17:08,887 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-09-20 13:17:08,888 INFO L327 TraceCheckSpWp]: Computing backward predicates...