./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_fermat2-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 27b49876 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_fermat2-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 9ae1eacd45e2434e505261d43bb17259916099964617682d271ef41fa1c24d0c --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-27b4987-m [2024-09-21 12:36:14,119 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-21 12:36:14,199 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-21 12:36:14,204 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-21 12:36:14,204 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-21 12:36:14,238 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-21 12:36:14,238 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-21 12:36:14,239 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-21 12:36:14,240 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-21 12:36:14,241 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-21 12:36:14,241 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-21 12:36:14,242 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-21 12:36:14,243 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-21 12:36:14,243 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-21 12:36:14,245 INFO L153 SettingsManager]: * Use SBE=true [2024-09-21 12:36:14,245 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-21 12:36:14,245 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-21 12:36:14,246 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-21 12:36:14,246 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-21 12:36:14,246 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-21 12:36:14,247 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-21 12:36:14,251 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-21 12:36:14,251 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-21 12:36:14,252 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-21 12:36:14,252 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-21 12:36:14,252 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-21 12:36:14,252 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-21 12:36:14,253 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-21 12:36:14,253 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-21 12:36:14,253 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-21 12:36:14,254 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-21 12:36:14,254 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-21 12:36:14,254 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 12:36:14,255 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-21 12:36:14,255 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-21 12:36:14,255 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-21 12:36:14,255 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-21 12:36:14,255 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-21 12:36:14,256 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-21 12:36:14,256 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-21 12:36:14,256 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-21 12:36:14,258 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-21 12:36:14,258 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ae1eacd45e2434e505261d43bb17259916099964617682d271ef41fa1c24d0c Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-21 12:36:14,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-21 12:36:14,563 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-21 12:36:14,567 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-21 12:36:14,569 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-21 12:36:14,570 INFO L274 PluginConnector]: CDTParser initialized [2024-09-21 12:36:14,571 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_fermat2-ll.c [2024-09-21 12:36:16,148 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-21 12:36:16,356 INFO L384 CDTParser]: Found 1 translation units. [2024-09-21 12:36:16,357 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_fermat2-ll.c [2024-09-21 12:36:16,368 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/da3a90bf2/4c445c3fa8c44e27b8b33aef8ffceb34/FLAG022e8da54 [2024-09-21 12:36:16,388 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/da3a90bf2/4c445c3fa8c44e27b8b33aef8ffceb34 [2024-09-21 12:36:16,391 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-21 12:36:16,393 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-21 12:36:16,396 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-21 12:36:16,397 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-21 12:36:16,403 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-21 12:36:16,404 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:36:16" (1/1) ... [2024-09-21 12:36:16,405 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c36e96e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:16, skipping insertion in model container [2024-09-21 12:36:16,405 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:36:16" (1/1) ... [2024-09-21 12:36:16,432 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-21 12:36:16,610 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_fermat2-ll.c[1060,1073] [2024-09-21 12:36:16,629 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 12:36:16,645 INFO L200 MainTranslator]: Completed pre-run [2024-09-21 12:36:16,659 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_fermat2-ll.c[1060,1073] [2024-09-21 12:36:16,670 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 12:36:16,690 INFO L204 MainTranslator]: Completed translation [2024-09-21 12:36:16,694 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:16 WrapperNode [2024-09-21 12:36:16,694 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-21 12:36:16,696 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-21 12:36:16,696 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-21 12:36:16,696 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-21 12:36:16,704 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:16" (1/1) ... [2024-09-21 12:36:16,711 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:16" (1/1) ... [2024-09-21 12:36:16,717 INFO L138 Inliner]: procedures = 16, calls = 59, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-21 12:36:16,717 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-21 12:36:16,718 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-21 12:36:16,718 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-21 12:36:16,718 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-21 12:36:16,729 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:16" (1/1) ... [2024-09-21 12:36:16,729 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:16" (1/1) ... [2024-09-21 12:36:16,732 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:16" (1/1) ... [2024-09-21 12:36:16,749 INFO L175 MemorySlicer]: Split 36 memory accesses to 5 slices as follows [2, 10, 10, 6, 8]. 28 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 8 writes are split as follows [0, 2, 2, 1, 3]. [2024-09-21 12:36:16,749 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:16" (1/1) ... [2024-09-21 12:36:16,750 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:16" (1/1) ... [2024-09-21 12:36:16,771 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:16" (1/1) ... [2024-09-21 12:36:16,773 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:16" (1/1) ... [2024-09-21 12:36:16,775 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:16" (1/1) ... [2024-09-21 12:36:16,776 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:16" (1/1) ... [2024-09-21 12:36:16,780 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-21 12:36:16,781 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-21 12:36:16,782 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-21 12:36:16,782 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-21 12:36:16,783 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:16" (1/1) ... [2024-09-21 12:36:16,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 12:36:16,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:36:16,830 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) [2024-09-21 12:36:16,834 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 [2024-09-21 12:36:16,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-21 12:36:16,876 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-21 12:36:16,877 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-21 12:36:16,877 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-21 12:36:16,877 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-21 12:36:16,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-21 12:36:16,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-21 12:36:16,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-21 12:36:16,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-21 12:36:16,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-21 12:36:16,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-21 12:36:16,880 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_42_0 [2024-09-21 12:36:16,880 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_42_0 [2024-09-21 12:36:16,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-21 12:36:16,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-21 12:36:16,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-21 12:36:16,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-21 12:36:16,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-21 12:36:16,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-21 12:36:16,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-21 12:36:16,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-21 12:36:16,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-21 12:36:16,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-21 12:36:16,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-21 12:36:16,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-21 12:36:16,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-21 12:36:16,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-21 12:36:16,882 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-21 12:36:16,882 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-21 12:36:16,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-21 12:36:16,967 INFO L242 CfgBuilder]: Building ICFG [2024-09-21 12:36:16,969 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-21 12:36:17,164 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-21 12:36:17,164 INFO L291 CfgBuilder]: Performing block encoding [2024-09-21 12:36:17,193 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-21 12:36:17,194 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-21 12:36:17,194 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:36:17 BoogieIcfgContainer [2024-09-21 12:36:17,195 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-21 12:36:17,197 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-21 12:36:17,198 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-21 12:36:17,201 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-21 12:36:17,202 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:36:16" (1/3) ... [2024-09-21 12:36:17,203 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3114640 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:36:17, skipping insertion in model container [2024-09-21 12:36:17,203 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:16" (2/3) ... [2024-09-21 12:36:17,204 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3114640 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:36:17, skipping insertion in model container [2024-09-21 12:36:17,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:36:17" (3/3) ... [2024-09-21 12:36:17,206 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_fermat2-ll.c [2024-09-21 12:36:17,227 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-21 12:36:17,228 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-21 12:36:17,294 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-21 12:36:17,301 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;@30463191, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-21 12:36:17,302 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-21 12:36:17,308 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-21 12:36:17,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-21 12:36:17,319 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:36:17,319 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:36:17,320 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:36:17,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:36:17,326 INFO L85 PathProgramCache]: Analyzing trace with hash -896464560, now seen corresponding path program 1 times [2024-09-21 12:36:17,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:36:17,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473063625] [2024-09-21 12:36:17,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:36:17,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:36:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:36:17,553 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:36:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:36:17,563 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:36:17,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:36:17,569 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 12:36:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:36:17,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 12:36:17,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:36:17,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473063625] [2024-09-21 12:36:17,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473063625] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:36:17,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:36:17,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-21 12:36:17,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277520260] [2024-09-21 12:36:17,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:36:17,586 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-21 12:36:17,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:36:17,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-21 12:36:17,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-21 12:36:17,631 INFO L87 Difference]: Start difference. First operand has 35 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-21 12:36:17,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:36:17,668 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2024-09-21 12:36:17,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-21 12:36:17,672 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-09-21 12:36:17,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:36:17,679 INFO L225 Difference]: With dead ends: 64 [2024-09-21 12:36:17,679 INFO L226 Difference]: Without dead ends: 31 [2024-09-21 12:36:17,682 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-21 12:36:17,686 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 12:36:17,688 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 12:36:17,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-21 12:36:17,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-21 12:36:17,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-21 12:36:17,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-09-21 12:36:17,793 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2024-09-21 12:36:17,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:36:17,794 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-09-21 12:36:17,795 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-21 12:36:17,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:36:17,795 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-09-21 12:36:17,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-21 12:36:17,799 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:36:17,800 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:36:17,800 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-21 12:36:17,800 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:36:17,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:36:17,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1783747884, now seen corresponding path program 1 times [2024-09-21 12:36:17,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:36:17,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775127864] [2024-09-21 12:36:17,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:36:17,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:36:17,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:36:17,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1846867432] [2024-09-21 12:36:17,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:36:17,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:36:17,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:36:17,954 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) [2024-09-21 12:36:17,956 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-21 12:36:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:36:18,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-09-21 12:36:18,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:36:18,214 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 [2024-09-21 12:36:18,250 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 [2024-09-21 12:36:18,266 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 21 treesize of output 15 [2024-09-21 12:36:18,280 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 [2024-09-21 12:36:18,564 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 39 treesize of output 31 [2024-09-21 12:36:18,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2024-09-21 12:36:18,600 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 56 treesize of output 32 [2024-09-21 12:36:18,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 12:36:18,736 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 12:36:18,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:36:18,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775127864] [2024-09-21 12:36:18,737 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:36:18,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846867432] [2024-09-21 12:36:18,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846867432] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:36:18,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:36:18,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-21 12:36:18,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803032127] [2024-09-21 12:36:18,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:36:18,740 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-21 12:36:18,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:36:18,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-21 12:36:18,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-21 12:36:18,742 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-21 12:36:24,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-21 12:36:24,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:36:24,468 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2024-09-21 12:36:24,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-21 12:36:24,468 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2024-09-21 12:36:24,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:36:24,471 INFO L225 Difference]: With dead ends: 46 [2024-09-21 12:36:24,471 INFO L226 Difference]: Without dead ends: 44 [2024-09-21 12:36:24,471 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-21 12:36:24,472 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 14 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2024-09-21 12:36:24,473 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 146 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 97 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2024-09-21 12:36:24,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-09-21 12:36:24,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2024-09-21 12:36:24,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 28 states have internal predecessors, (30), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-21 12:36:24,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2024-09-21 12:36:24,500 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 24 [2024-09-21 12:36:24,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:36:24,501 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2024-09-21 12:36:24,501 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-21 12:36:24,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:36:24,502 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2024-09-21 12:36:24,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-21 12:36:24,504 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:36:24,504 INFO L216 NwaCegarLoop]: trace histogram [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] [2024-09-21 12:36:24,525 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-21 12:36:24,708 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:36:24,709 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:36:24,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:36:24,710 INFO L85 PathProgramCache]: Analyzing trace with hash -391677542, now seen corresponding path program 1 times [2024-09-21 12:36:24,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:36:24,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119632205] [2024-09-21 12:36:24,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:36:24,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:36:24,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:36:24,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1573151110] [2024-09-21 12:36:24,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:36:24,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:36:24,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:36:24,786 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) [2024-09-21 12:36:24,789 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-21 12:36:24,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:36:24,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-21 12:36:24,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:36:25,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-09-21 12:36:25,153 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 [2024-09-21 12:36:25,175 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 [2024-09-21 12:36:25,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-09-21 12:36:25,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 33 [2024-09-21 12:36:28,264 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 99 treesize of output 63 [2024-09-21 12:36:28,295 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:36:28,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 65 [2024-09-21 12:36:28,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:36:28,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:36:31,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:36:31,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119632205] [2024-09-21 12:36:31,332 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:36:31,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573151110] [2024-09-21 12:36:31,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573151110] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:36:31,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:36:31,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-21 12:36:31,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541776602] [2024-09-21 12:36:31,337 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:36:31,337 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-21 12:36:31,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:36:31,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-21 12:36:31,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2024-09-21 12:36:31,339 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 19 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 6 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-21 12:36:37,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.80s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-21 12:36:41,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-21 12:36:45,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-21 12:36:46,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-21 12:36:47,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-21 12:36:48,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:36:48,024 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2024-09-21 12:36:48,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-21 12:36:48,025 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 6 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 34 [2024-09-21 12:36:48,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:36:48,027 INFO L225 Difference]: With dead ends: 56 [2024-09-21 12:36:48,027 INFO L226 Difference]: Without dead ends: 46 [2024-09-21 12:36:48,027 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2024-09-21 12:36:48,028 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 23 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 6 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.3s IncrementalHoareTripleChecker+Time [2024-09-21 12:36:48,029 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 101 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 367 Invalid, 3 Unknown, 0 Unchecked, 16.3s Time] [2024-09-21 12:36:48,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-21 12:36:48,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-09-21 12:36:48,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-21 12:36:48,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2024-09-21 12:36:48,044 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 34 [2024-09-21 12:36:48,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:36:48,045 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2024-09-21 12:36:48,045 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 6 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-21 12:36:48,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:36:48,046 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2024-09-21 12:36:48,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-21 12:36:48,047 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:36:48,047 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:36:48,066 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-21 12:36:48,248 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:36:48,248 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:36:48,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:36:48,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1584173507, now seen corresponding path program 1 times [2024-09-21 12:36:48,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:36:48,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549524791] [2024-09-21 12:36:48,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:36:48,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:36:48,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:36:48,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [930796953] [2024-09-21 12:36:48,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:36:48,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:36:48,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:36:48,311 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) [2024-09-21 12:36:48,315 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-21 12:36:48,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:36:48,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 113 conjuncts are in the unsatisfiable core [2024-09-21 12:36:48,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:36:48,498 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 [2024-09-21 12:36:48,506 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 [2024-09-21 12:36:48,514 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 21 treesize of output 15 [2024-09-21 12:36:48,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 12:36:48,803 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 53 treesize of output 41 [2024-09-21 12:36:48,807 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 66 treesize of output 42 [2024-09-21 12:36:54,885 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 39 treesize of output 31 [2024-09-21 12:36:54,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2024-09-21 12:36:54,898 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 56 treesize of output 32 [2024-09-21 12:36:54,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-21 12:36:54,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:37:02,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-21 12:37:02,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:37:02,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549524791] [2024-09-21 12:37:02,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:37:02,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930796953] [2024-09-21 12:37:02,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930796953] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:37:02,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 12:37:02,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2024-09-21 12:37:02,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548030849] [2024-09-21 12:37:02,179 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 12:37:02,179 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-21 12:37:02,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:37:02,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-21 12:37:02,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-21 12:37:02,181 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 13 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 states have internal predecessors, (29), 7 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-21 12:37:03,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-21 12:37:04,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-21 12:37:12,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:37:12,427 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2024-09-21 12:37:12,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-21 12:37:12,430 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 states have internal predecessors, (29), 7 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2024-09-21 12:37:12,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:37:12,432 INFO L225 Difference]: With dead ends: 79 [2024-09-21 12:37:12,432 INFO L226 Difference]: Without dead ends: 73 [2024-09-21 12:37:12,432 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2024-09-21 12:37:12,436 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 43 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-09-21 12:37:12,437 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 151 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2024-09-21 12:37:12,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-21 12:37:12,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 48. [2024-09-21 12:37:12,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-21 12:37:12,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2024-09-21 12:37:12,472 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 35 [2024-09-21 12:37:12,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:37:12,472 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2024-09-21 12:37:12,473 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 states have internal predecessors, (29), 7 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-21 12:37:12,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:37:12,474 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2024-09-21 12:37:12,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-21 12:37:12,477 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:37:12,477 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:37:12,489 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-21 12:37:12,677 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:37:12,678 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:37:12,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:37:12,679 INFO L85 PathProgramCache]: Analyzing trace with hash 987710829, now seen corresponding path program 1 times [2024-09-21 12:37:12,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:37:12,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248094477] [2024-09-21 12:37:12,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:37:12,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:37:12,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:37:12,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1388308170] [2024-09-21 12:37:12,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:37:12,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:37:12,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:37:12,773 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) [2024-09-21 12:37:12,774 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-21 12:37:12,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:37:12,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 139 conjuncts are in the unsatisfiable core [2024-09-21 12:37:12,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:37:12,907 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 [2024-09-21 12:37:12,987 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 21 treesize of output 15 [2024-09-21 12:37:12,992 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 [2024-09-21 12:37:13,011 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 [2024-09-21 12:37:13,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-09-21 12:37:13,753 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 49 treesize of output 33 [2024-09-21 12:37:23,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 41 [2024-09-21 12:37:23,239 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 101 treesize of output 65 [2024-09-21 12:37:28,395 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:37:28,395 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 143 treesize of output 135 [2024-09-21 12:37:28,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 40 [2024-09-21 12:37:28,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 70 [2024-09-21 12:37:29,009 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 12 refuted. 1 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-21 12:37:29,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:37:32,058 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 133 treesize of output 97 [2024-09-21 12:37:32,069 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 65 [2024-09-21 12:37:32,079 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 65 treesize of output 61 [2024-09-21 12:37:47,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:37:47,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248094477] [2024-09-21 12:37:47,067 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:37:47,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388308170] [2024-09-21 12:37:47,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388308170] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:37:47,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:37:47,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-21 12:37:47,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130875743] [2024-09-21 12:37:47,068 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:37:47,068 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-21 12:37:47,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:37:47,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-21 12:37:47,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=878, Unknown=3, NotChecked=0, Total=992 [2024-09-21 12:37:47,069 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 23 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 8 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-21 12:37:51,083 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] [2024-09-21 12:37:55,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-21 12:37:59,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-21 12:38:03,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-21 12:38:09,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-21 12:38:13,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-21 12:38:14,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-21 12:38:16,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:38:16,135 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2024-09-21 12:38:16,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-21 12:38:16,136 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 8 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Word has length 47 [2024-09-21 12:38:16,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:38:16,138 INFO L225 Difference]: With dead ends: 65 [2024-09-21 12:38:16,138 INFO L226 Difference]: Without dead ends: 59 [2024-09-21 12:38:16,140 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 28.2s TimeCoverageRelationStatistics Valid=237, Invalid=1922, Unknown=3, NotChecked=0, Total=2162 [2024-09-21 12:38:16,141 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 48 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 19 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.0s IncrementalHoareTripleChecker+Time [2024-09-21 12:38:16,141 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 135 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 586 Invalid, 6 Unknown, 0 Unchecked, 27.0s Time] [2024-09-21 12:38:16,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-21 12:38:16,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-09-21 12:38:16,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 38 states have (on average 1.105263157894737) internal successors, (42), 39 states have internal predecessors, (42), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-09-21 12:38:16,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2024-09-21 12:38:16,200 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 47 [2024-09-21 12:38:16,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:38:16,201 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2024-09-21 12:38:16,201 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 8 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-21 12:38:16,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:16,201 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2024-09-21 12:38:16,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-21 12:38:16,204 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:38:16,204 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:38:16,225 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-21 12:38:16,409 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:38:16,410 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:38:16,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:16,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1805359279, now seen corresponding path program 1 times [2024-09-21 12:38:16,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:38:16,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852079239] [2024-09-21 12:38:16,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:16,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:38:16,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:38:16,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1545343870] [2024-09-21 12:38:16,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:16,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:38:16,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:38:16,474 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) [2024-09-21 12:38:16,475 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-21 12:38:16,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:16,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-09-21 12:38:16,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:38:16,693 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 21 treesize of output 15 [2024-09-21 12:38:16,697 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 [2024-09-21 12:38:16,712 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 [2024-09-21 12:38:16,753 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 31 treesize of output 27 [2024-09-21 12:38:16,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2024-09-21 12:38:23,838 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 [2024-09-21 12:38:24,019 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:38:24,019 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 98 treesize of output 114 [2024-09-21 12:38:24,028 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 85 treesize of output 49 [2024-09-21 12:38:28,205 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-21 12:38:28,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:38:34,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:38:34,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852079239] [2024-09-21 12:38:34,001 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:38:34,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545343870] [2024-09-21 12:38:34,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545343870] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:38:34,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:38:34,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-21 12:38:34,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556680060] [2024-09-21 12:38:34,002 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:38:34,002 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-21 12:38:34,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:38:34,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-21 12:38:34,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=569, Unknown=1, NotChecked=0, Total=650 [2024-09-21 12:38:34,003 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 21 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 8 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-21 12:38:38,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-21 12:38:42,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-21 12:38:48,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.80s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-21 12:40:10,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36m for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-21 12:40:11,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:40:11,226 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2024-09-21 12:40:11,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-21 12:40:11,226 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 8 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Word has length 47 [2024-09-21 12:40:11,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:40:11,228 INFO L225 Difference]: With dead ends: 68 [2024-09-21 12:40:11,228 INFO L226 Difference]: Without dead ends: 62 [2024-09-21 12:40:11,229 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=135, Invalid=1054, Unknown=1, NotChecked=0, Total=1190 [2024-09-21 12:40:11,229 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 23 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 9 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 96.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 96.8s IncrementalHoareTripleChecker+Time [2024-09-21 12:40:11,230 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 126 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 502 Invalid, 4 Unknown, 0 Unchecked, 96.8s Time] [2024-09-21 12:40:11,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-09-21 12:40:11,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-09-21 12:40:11,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 41 states have internal predecessors, (43), 12 states have call successors, (12), 10 states have call predecessors, (12), 10 states have return successors, (17), 10 states have call predecessors, (17), 10 states have call successors, (17) [2024-09-21 12:40:11,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2024-09-21 12:40:11,281 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 47 [2024-09-21 12:40:11,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:40:11,281 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2024-09-21 12:40:11,282 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 8 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-21 12:40:11,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:40:11,282 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2024-09-21 12:40:11,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-21 12:40:11,284 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:40:11,284 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:40:11,302 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-21 12:40:11,487 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-21 12:40:11,488 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:40:11,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:40:11,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1682971646, now seen corresponding path program 2 times [2024-09-21 12:40:11,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:40:11,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560992499] [2024-09-21 12:40:11,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:40:11,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:40:11,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:40:11,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [545011675] [2024-09-21 12:40:11,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 12:40:11,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:40:11,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:40:11,534 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) [2024-09-21 12:40:11,538 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-21 12:40:11,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 12:40:11,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:40:11,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 110 conjuncts are in the unsatisfiable core [2024-09-21 12:40:11,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:40:11,721 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 [2024-09-21 12:40:11,778 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 21 treesize of output 15 [2024-09-21 12:40:11,782 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 [2024-09-21 12:40:11,793 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 [2024-09-21 12:40:11,823 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 27 [2024-09-21 12:40:11,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2024-09-21 12:40:12,694 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 75 treesize of output 59 [2024-09-21 12:40:12,697 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 159 treesize of output 99 [2024-09-21 12:40:12,768 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 101 treesize of output 61 [2024-09-21 12:40:12,781 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:40:12,781 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 67 treesize of output 63 [2024-09-21 12:40:12,880 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-21 12:40:12,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:40:18,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:40:18,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560992499] [2024-09-21 12:40:18,926 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:40:18,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545011675] [2024-09-21 12:40:18,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545011675] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:40:18,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:40:18,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-21 12:40:18,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538768330] [2024-09-21 12:40:18,926 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:40:18,927 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-21 12:40:18,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:40:18,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-21 12:40:18,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2024-09-21 12:40:18,928 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 23 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 20 states have internal predecessors, (32), 9 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-21 12:40:22,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-21 12:40:27,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-21 12:40:32,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-21 12:40:33,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:40:33,216 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2024-09-21 12:40:33,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-21 12:40:33,217 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 20 states have internal predecessors, (32), 9 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Word has length 60 [2024-09-21 12:40:33,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:40:33,218 INFO L225 Difference]: With dead ends: 72 [2024-09-21 12:40:33,218 INFO L226 Difference]: Without dead ends: 66 [2024-09-21 12:40:33,219 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 33 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2024-09-21 12:40:33,219 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 20 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 7 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2024-09-21 12:40:33,219 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 151 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 611 Invalid, 3 Unknown, 0 Unchecked, 13.8s Time] [2024-09-21 12:40:33,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-21 12:40:33,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2024-09-21 12:40:33,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.1) internal successors, (44), 42 states have internal predecessors, (44), 12 states have call successors, (12), 10 states have call predecessors, (12), 11 states have return successors, (19), 11 states have call predecessors, (19), 10 states have call successors, (19) [2024-09-21 12:40:33,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2024-09-21 12:40:33,274 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 60 [2024-09-21 12:40:33,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:40:33,274 INFO L474 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2024-09-21 12:40:33,274 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 20 states have internal predecessors, (32), 9 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-21 12:40:33,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:40:33,275 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2024-09-21 12:40:33,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-21 12:40:33,276 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:40:33,276 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:40:33,290 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-21 12:40:33,477 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 [2024-09-21 12:40:33,477 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:40:33,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:40:33,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1829439806, now seen corresponding path program 2 times [2024-09-21 12:40:33,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:40:33,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662981968] [2024-09-21 12:40:33,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:40:33,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:40:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:40:33,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250451284] [2024-09-21 12:40:33,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 12:40:33,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:40:33,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:40:33,538 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) [2024-09-21 12:40:33,539 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-21 12:40:33,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 12:40:33,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:40:33,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 125 conjuncts are in the unsatisfiable core [2024-09-21 12:40:33,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:40:33,766 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 [2024-09-21 12:40:33,873 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 21 treesize of output 15 [2024-09-21 12:40:33,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 12:40:33,893 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 [2024-09-21 12:40:33,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-09-21 12:40:33,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 33 [2024-09-21 12:40:41,033 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 [2024-09-21 12:40:41,107 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:40:41,107 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 91 treesize of output 87 [2024-09-21 12:40:41,113 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 103 treesize of output 67 [2024-09-21 12:40:42,874 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-21 12:40:42,874 INFO L327 TraceCheckSpWp]: Computing backward predicates...