./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_geo2-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5189fb62 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_geo2-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 50e0d41004ce88a8f3ef708f136426d09103c1930174c9041afa0700d3101d58 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-5189fb6-m [2024-09-13 04:18:23,913 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 04:18:23,986 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 04:18:23,990 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 04:18:23,990 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 04:18:24,009 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 04:18:24,010 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 04:18:24,010 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 04:18:24,010 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 04:18:24,011 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 04:18:24,012 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 04:18:24,012 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 04:18:24,013 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 04:18:24,014 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 04:18:24,016 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 04:18:24,016 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 04:18:24,016 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 04:18:24,017 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 04:18:24,017 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 04:18:24,017 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 04:18:24,017 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 04:18:24,021 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 04:18:24,021 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 04:18:24,021 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 04:18:24,022 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 04:18:24,022 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 04:18:24,022 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 04:18:24,022 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 04:18:24,023 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 04:18:24,023 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 04:18:24,023 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 04:18:24,023 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 04:18:24,023 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 04:18:24,023 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 04:18:24,024 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 04:18:24,024 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 04:18:24,024 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 04:18:24,024 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 04:18:24,025 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 04:18:24,025 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 04:18:24,026 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 04:18:24,026 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 04:18:24,026 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 50e0d41004ce88a8f3ef708f136426d09103c1930174c9041afa0700d3101d58 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-13 04:18:24,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 04:18:24,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 04:18:24,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 04:18:24,318 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 04:18:24,319 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 04:18:24,320 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_geo2-ll.c [2024-09-13 04:18:25,756 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 04:18:25,998 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 04:18:25,999 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_geo2-ll.c [2024-09-13 04:18:26,010 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/e5b388358/9f9dd6b1daeb4bfbb11773f4cff8ae9c/FLAG39645f9e7 [2024-09-13 04:18:26,349 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/e5b388358/9f9dd6b1daeb4bfbb11773f4cff8ae9c [2024-09-13 04:18:26,352 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 04:18:26,354 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-13 04:18:26,355 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 04:18:26,357 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 04:18:26,363 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 04:18:26,364 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 04:18:26" (1/1) ... [2024-09-13 04:18:26,365 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a6c50b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:18:26, skipping insertion in model container [2024-09-13 04:18:26,365 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 04:18:26" (1/1) ... [2024-09-13 04:18:26,385 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 04:18:26,537 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_geo2-ll.c[1055,1068] [2024-09-13 04:18:26,561 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 04:18:26,581 INFO L200 MainTranslator]: Completed pre-run [2024-09-13 04:18:26,595 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_geo2-ll.c[1055,1068] [2024-09-13 04:18:26,608 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 04:18:26,631 INFO L204 MainTranslator]: Completed translation [2024-09-13 04:18:26,635 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:18:26 WrapperNode [2024-09-13 04:18:26,635 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 04:18:26,636 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 04:18:26,637 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 04:18:26,637 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 04:18:26,644 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:18:26" (1/1) ... [2024-09-13 04:18:26,652 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:18:26" (1/1) ... [2024-09-13 04:18:26,659 INFO L138 Inliner]: procedures = 16, calls = 51, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-13 04:18:26,659 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 04:18:26,660 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 04:18:26,660 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 04:18:26,660 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 04:18:26,669 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:18:26" (1/1) ... [2024-09-13 04:18:26,669 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:18:26" (1/1) ... [2024-09-13 04:18:26,672 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:18:26" (1/1) ... [2024-09-13 04:18:26,688 INFO L175 MemorySlicer]: Split 27 memory accesses to 6 slices as follows [2, 2, 5, 7, 4, 7]. 26 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 8 writes are split as follows [0, 1, 2, 1, 2, 2]. [2024-09-13 04:18:26,689 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:18:26" (1/1) ... [2024-09-13 04:18:26,689 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:18:26" (1/1) ... [2024-09-13 04:18:26,696 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:18:26" (1/1) ... [2024-09-13 04:18:26,700 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:18:26" (1/1) ... [2024-09-13 04:18:26,702 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:18:26" (1/1) ... [2024-09-13 04:18:26,703 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:18:26" (1/1) ... [2024-09-13 04:18:26,706 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 04:18:26,707 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 04:18:26,707 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 04:18:26,707 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 04:18:26,708 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:18:26" (1/1) ... [2024-09-13 04:18:26,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 04:18:26,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:18:26,748 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) [2024-09-13 04:18:26,751 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 [2024-09-13 04:18:26,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 04:18:26,802 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-13 04:18:26,802 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-13 04:18:26,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-13 04:18:26,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-13 04:18:26,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-13 04:18:26,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-13 04:18:26,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-13 04:18:26,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-13 04:18:26,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-13 04:18:26,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-13 04:18:26,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-13 04:18:26,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-13 04:18:26,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-13 04:18:26,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-13 04:18:26,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-13 04:18:26,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-13 04:18:26,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-13 04:18:26,805 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_30_to_38_0 [2024-09-13 04:18:26,805 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_30_to_38_0 [2024-09-13 04:18:26,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 04:18:26,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 04:18:26,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-13 04:18:26,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-13 04:18:26,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-13 04:18:26,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-13 04:18:26,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-13 04:18:26,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-13 04:18:26,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-13 04:18:26,806 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-13 04:18:26,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-13 04:18:26,924 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 04:18:26,926 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 04:18:27,151 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-09-13 04:18:27,152 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 04:18:27,181 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 04:18:27,181 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-13 04:18:27,182 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 04:18:27 BoogieIcfgContainer [2024-09-13 04:18:27,182 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 04:18:27,183 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 04:18:27,183 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 04:18:27,186 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 04:18:27,187 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 04:18:26" (1/3) ... [2024-09-13 04:18:27,187 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32d2ceea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 04:18:27, skipping insertion in model container [2024-09-13 04:18:27,187 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:18:26" (2/3) ... [2024-09-13 04:18:27,188 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32d2ceea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 04:18:27, skipping insertion in model container [2024-09-13 04:18:27,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 04:18:27" (3/3) ... [2024-09-13 04:18:27,191 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_geo2-ll.c [2024-09-13 04:18:27,206 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 04:18:27,206 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-13 04:18:27,269 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 04:18:27,277 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;@2f8de3b7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 04:18:27,278 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-13 04:18:27,282 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 16 states have internal predecessors, (18), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-13 04:18:27,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-13 04:18:27,292 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:18:27,293 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:18:27,293 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:18:27,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:18:27,299 INFO L85 PathProgramCache]: Analyzing trace with hash 784733954, now seen corresponding path program 1 times [2024-09-13 04:18:27,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:18:27,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987850753] [2024-09-13 04:18:27,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:18:27,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:18:27,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 04:18:27,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [609760336] [2024-09-13 04:18:27,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:18:27,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:18:27,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:18:27,509 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) [2024-09-13 04:18:27,511 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 04:18:27,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:18:27,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-13 04:18:27,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 04:18:27,722 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 [2024-09-13 04:18:27,731 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 [2024-09-13 04:18:27,741 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 [2024-09-13 04:18:27,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-13 04:18:27,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 04:18:27,912 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 04:18:27,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:18:27,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987850753] [2024-09-13 04:18:27,914 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 04:18:27,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609760336] [2024-09-13 04:18:27,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609760336] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 04:18:27,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 04:18:27,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-13 04:18:27,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092121956] [2024-09-13 04:18:27,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 04:18:27,923 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 04:18:27,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:18:27,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 04:18:27,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-13 04:18:27,947 INFO L87 Difference]: Start difference. First operand has 26 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 16 states have internal predecessors, (18), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 04:18:28,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:18:28,130 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2024-09-13 04:18:28,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-13 04:18:28,134 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-09-13 04:18:28,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:18:28,141 INFO L225 Difference]: With dead ends: 58 [2024-09-13 04:18:28,141 INFO L226 Difference]: Without dead ends: 34 [2024-09-13 04:18:28,145 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-13 04:18:28,149 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 12 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 04:18:28,150 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 116 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 04:18:28,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-13 04:18:28,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2024-09-13 04:18:28,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-13 04:18:28,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2024-09-13 04:18:28,187 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 12 [2024-09-13 04:18:28,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:18:28,187 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2024-09-13 04:18:28,187 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 04:18:28,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:18:28,188 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2024-09-13 04:18:28,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-13 04:18:28,189 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:18:28,189 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:18:28,207 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-13 04:18:28,390 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-09-13 04:18:28,391 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:18:28,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:18:28,391 INFO L85 PathProgramCache]: Analyzing trace with hash 646538741, now seen corresponding path program 1 times [2024-09-13 04:18:28,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:18:28,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33864571] [2024-09-13 04:18:28,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:18:28,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:18:28,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 04:18:28,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1457674428] [2024-09-13 04:18:28,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:18:28,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:18:28,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:18:28,512 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) [2024-09-13 04:18:28,514 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 04:18:28,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:18:28,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-09-13 04:18:28,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 04:18:28,782 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 1 [2024-09-13 04:18:28,789 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 [2024-09-13 04:18:28,800 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 [2024-09-13 04:18:29,051 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 23 treesize of output 15 [2024-09-13 04:18:29,060 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 25 treesize of output 17 [2024-09-13 04:18:29,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 26 [2024-09-13 04:18:29,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 29 [2024-09-13 04:18:29,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-13 04:18:29,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 04:18:29,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 04:18:47,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 04:18:47,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:18:47,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33864571] [2024-09-13 04:18:47,877 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 04:18:47,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457674428] [2024-09-13 04:18:47,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457674428] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 04:18:47,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 04:18:47,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2024-09-13 04:18:47,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838743414] [2024-09-13 04:18:47,879 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 04:18:47,879 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-13 04:18:47,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:18:47,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-13 04:18:47,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=290, Unknown=2, NotChecked=0, Total=342 [2024-09-13 04:18:47,881 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 19 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 13 states have internal predecessors, (26), 9 states have call successors, (10), 8 states have call predecessors, (10), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 04:19:04,134 WARN L293 SmtUtils]: Spent 8.15s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 04:19:26,036 WARN L293 SmtUtils]: Spent 13.72s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 04:19:49,064 WARN L293 SmtUtils]: Spent 20.09s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 04:19:53,076 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 [] [2024-09-13 04:19:57,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-13 04:20:01,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-13 04:20:03,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-13 04:20:07,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-13 04:20:11,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-13 04:20:42,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-13 04:20:46,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-13 04:21:15,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-13 04:21:19,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-13 04:21:23,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-13 04:21:27,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-13 04:21:31,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-13 04:21:35,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-13 04:21:39,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-13 04:21:43,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-13 04:21:47,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-13 04:21:51,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-13 04:21:55,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-13 04:21:59,744 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 [] [2024-09-13 04:21:59,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:21:59,777 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2024-09-13 04:21:59,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-13 04:21:59,778 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 13 states have internal predecessors, (26), 9 states have call successors, (10), 8 states have call predecessors, (10), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2024-09-13 04:21:59,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:21:59,782 INFO L225 Difference]: With dead ends: 77 [2024-09-13 04:21:59,782 INFO L226 Difference]: Without dead ends: 73 [2024-09-13 04:21:59,783 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 129.8s TimeCoverageRelationStatistics Valid=172, Invalid=806, Unknown=14, NotChecked=0, Total=992 [2024-09-13 04:21:59,784 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 67 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 28 mSolverCounterUnsat, 19 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 80.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 19 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 80.5s IncrementalHoareTripleChecker+Time [2024-09-13 04:21:59,785 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 185 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 231 Invalid, 19 Unknown, 0 Unchecked, 80.5s Time] [2024-09-13 04:21:59,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-13 04:21:59,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2024-09-13 04:21:59,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 48 states have internal predecessors, (50), 14 states have call successors, (14), 11 states have call predecessors, (14), 12 states have return successors, (18), 12 states have call predecessors, (18), 11 states have call successors, (18) [2024-09-13 04:21:59,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2024-09-13 04:21:59,831 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 22 [2024-09-13 04:21:59,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:21:59,831 INFO L474 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2024-09-13 04:21:59,832 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 13 states have internal predecessors, (26), 9 states have call successors, (10), 8 states have call predecessors, (10), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 04:21:59,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:21:59,832 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2024-09-13 04:21:59,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-13 04:21:59,833 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:21:59,833 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:21:59,854 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-13 04:22:00,033 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:22:00,035 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:22:00,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:22:00,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1703476452, now seen corresponding path program 1 times [2024-09-13 04:22:00,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:22:00,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660187859] [2024-09-13 04:22:00,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:22:00,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:22:00,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 04:22:00,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [347697600] [2024-09-13 04:22:00,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:22:00,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:22:00,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:22:00,112 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) [2024-09-13 04:22:00,114 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-13 04:22:00,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:22:00,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-13 04:22:00,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 04:22:00,356 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 [2024-09-13 04:22:00,363 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 [2024-09-13 04:22:00,369 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 [2024-09-13 04:22:01,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-13 04:22:01,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 04:22:01,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 04:22:11,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 04:22:11,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:22:11,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660187859] [2024-09-13 04:22:11,540 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 04:22:11,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347697600] [2024-09-13 04:22:11,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347697600] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 04:22:11,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 04:22:11,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2024-09-13 04:22:11,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069080669] [2024-09-13 04:22:11,541 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 04:22:11,541 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-13 04:22:11,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:22:11,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-13 04:22:11,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=322, Unknown=1, NotChecked=0, Total=380 [2024-09-13 04:22:11,542 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand has 20 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 6 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-13 04:22:17,549 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 [] [2024-09-13 04:22:21,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-13 04:22:22,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:22:22,315 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2024-09-13 04:22:22,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-13 04:22:22,316 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 6 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 22 [2024-09-13 04:22:22,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:22:22,319 INFO L225 Difference]: With dead ends: 83 [2024-09-13 04:22:22,319 INFO L226 Difference]: Without dead ends: 65 [2024-09-13 04:22:22,320 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=115, Invalid=586, Unknown=1, NotChecked=0, Total=702 [2024-09-13 04:22:22,321 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 20 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2024-09-13 04:22:22,323 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 67 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 212 Invalid, 2 Unknown, 0 Unchecked, 9.4s Time] [2024-09-13 04:22:22,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-13 04:22:22,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-09-13 04:22:22,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 40 states have (on average 1.1) internal successors, (44), 43 states have internal predecessors, (44), 13 states have call successors, (13), 10 states have call predecessors, (13), 11 states have return successors, (18), 11 states have call predecessors, (18), 11 states have call successors, (18) [2024-09-13 04:22:22,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2024-09-13 04:22:22,375 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 22 [2024-09-13 04:22:22,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:22:22,375 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2024-09-13 04:22:22,376 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 6 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-13 04:22:22,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:22:22,376 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2024-09-13 04:22:22,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-13 04:22:22,377 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:22:22,378 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:22:22,391 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-13 04:22:22,578 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-09-13 04:22:22,579 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:22:22,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:22:22,579 INFO L85 PathProgramCache]: Analyzing trace with hash -541688170, now seen corresponding path program 1 times [2024-09-13 04:22:22,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:22:22,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109076056] [2024-09-13 04:22:22,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:22:22,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:22:22,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 04:22:22,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1826436146] [2024-09-13 04:22:22,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:22:22,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:22:22,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:22:22,689 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) [2024-09-13 04:22:22,693 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-13 04:22:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:22:22,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 118 conjuncts are in the unsatisfiable core [2024-09-13 04:22:22,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 04:22:22,906 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 [2024-09-13 04:22:22,912 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 [2024-09-13 04:22:23,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-13 04:22:23,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2024-09-13 04:22:23,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 31 [2024-09-13 04:22:23,691 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 23 [2024-09-13 04:22:23,806 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-13 04:22:23,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 04:22:30,826 WARN L293 SmtUtils]: Spent 6.21s on a formula simplification that was a NOOP. DAG size: 84 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-09-13 04:22:35,369 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 04:22:35,370 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 74 treesize of output 77 [2024-09-13 04:22:35,389 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 04:22:35,389 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 66 treesize of output 61 [2024-09-13 04:22:42,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:22:42,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109076056] [2024-09-13 04:22:42,472 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 04:22:42,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826436146] [2024-09-13 04:22:42,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826436146] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 04:22:42,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 04:22:42,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2024-09-13 04:22:42,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673584112] [2024-09-13 04:22:42,473 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 04:22:42,473 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-13 04:22:42,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:22:42,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-13 04:22:42,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=204, Unknown=1, NotChecked=0, Total=240 [2024-09-13 04:22:42,475 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 13 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 11 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-13 04:22:47,858 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 [] [2024-09-13 04:22:48,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:22:48,312 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2024-09-13 04:22:48,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-13 04:22:48,312 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 11 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 46 [2024-09-13 04:22:48,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:22:48,313 INFO L225 Difference]: With dead ends: 71 [2024-09-13 04:22:48,313 INFO L226 Difference]: Without dead ends: 49 [2024-09-13 04:22:48,314 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=66, Invalid=353, Unknown=1, NotChecked=0, Total=420 [2024-09-13 04:22:48,315 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-09-13 04:22:48,315 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 114 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2024-09-13 04:22:48,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-09-13 04:22:48,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2024-09-13 04:22:48,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 12 states have call successors, (12), 10 states have call predecessors, (12), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-13 04:22:48,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2024-09-13 04:22:48,337 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 46 [2024-09-13 04:22:48,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:22:48,337 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2024-09-13 04:22:48,337 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 11 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-13 04:22:48,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:22:48,338 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2024-09-13 04:22:48,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-13 04:22:48,339 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:22:48,339 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:22:48,359 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-13 04:22:48,540 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:22:48,540 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:22:48,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:22:48,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1730732978, now seen corresponding path program 2 times [2024-09-13 04:22:48,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:22:48,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322368200] [2024-09-13 04:22:48,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:22:48,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:22:48,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 04:22:48,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1332777006] [2024-09-13 04:22:48,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 04:22:48,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:22:48,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:22:48,661 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) [2024-09-13 04:22:48,663 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-13 04:22:56,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 04:22:56,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 04:22:56,690 WARN L260 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 256 conjuncts are in the unsatisfiable core [2024-09-13 04:22:56,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 04:22:56,705 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 [2024-09-13 04:22:56,711 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 [2024-09-13 04:22:56,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 04:22:56,721 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 11 treesize of output 7 [2024-09-13 04:22:56,888 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 23 treesize of output 15 [2024-09-13 04:22:56,896 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 25 treesize of output 17 [2024-09-13 04:22:56,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 04:22:57,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2024-09-13 04:22:57,103 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 37 treesize of output 25 [2024-09-13 04:22:57,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-13 04:22:57,830 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 48 treesize of output 36 [2024-09-13 04:22:57,842 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 39 treesize of output 27 [2024-09-13 04:22:59,386 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 64 treesize of output 52 [2024-09-13 04:22:59,395 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 44 treesize of output 32 [2024-09-13 04:22:59,712 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 39 [2024-09-13 04:22:59,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2024-09-13 04:22:59,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 04:22:59,905 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 04:22:59,905 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 04:23:27,731 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int#5| c_func_to_recursive_line_30_to_38_0_~x.base) c_func_to_recursive_line_30_to_38_0_~x.offset)) (.cse1 (select (select |c_#memory_int#3| c_func_to_recursive_line_30_to_38_0_~z.base) c_func_to_recursive_line_30_to_38_0_~z.offset)) (.cse2 (select (select |c_#memory_int#2| c_func_to_recursive_line_30_to_38_0_~y.base) c_func_to_recursive_line_30_to_38_0_~y.offset))) (or (not (= (mod (+ (* 18446744073709551615 .cse0) (* 18446744073709551615 .cse1 .cse2) (* .cse0 .cse1) 1) 18446744073709551616) 0)) (= (mod (+ (* 18446744073709551615 .cse0 .cse1) (* .cse0 .cse1 .cse1) .cse1 (* 18446744073709551615 .cse1 .cse1 .cse2)) 18446744073709551616) 0))) is different from true [2024-09-13 04:23:39,764 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_#memory_int#5| |c_func_to_recursive_line_30_to_38_0_#in~x.base|) |c_func_to_recursive_line_30_to_38_0_#in~x.offset|)) (.cse0 (select (select |c_#memory_int#3| |c_func_to_recursive_line_30_to_38_0_#in~z.base|) |c_func_to_recursive_line_30_to_38_0_#in~z.offset|)) (.cse1 (select (select |c_#memory_int#2| |c_func_to_recursive_line_30_to_38_0_#in~y.base|) |c_func_to_recursive_line_30_to_38_0_#in~y.offset|))) (or (= (mod (+ (* .cse0 .cse0 18446744073709551615 .cse1) .cse0 (* .cse2 .cse0 .cse0) (* .cse2 .cse0 18446744073709551615)) 18446744073709551616) 0) (not (= 0 (mod (+ (* .cse2 .cse0) (* .cse2 18446744073709551615) (* .cse0 18446744073709551615 .cse1) 1) 18446744073709551616))))) is different from true [2024-09-13 04:23:48,799 WARN L293 SmtUtils]: Spent 5.01s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-13 04:24:01,211 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_#memory_int#2| c_func_to_recursive_line_30_to_38_0_~y.base) c_func_to_recursive_line_30_to_38_0_~y.offset)) (.cse0 (select (select |c_#memory_int#5| c_func_to_recursive_line_30_to_38_0_~x.base) c_func_to_recursive_line_30_to_38_0_~x.offset)) (.cse1 (select (select |c_#memory_int#3| c_func_to_recursive_line_30_to_38_0_~z.base) c_func_to_recursive_line_30_to_38_0_~z.offset))) (or (not (= (mod (+ (* 18446744073709551615 .cse0 .cse1) (* .cse0 .cse1 .cse1) .cse1 (* 18446744073709551615 .cse1 .cse1 .cse2)) 18446744073709551616) 0)) (= (mod (+ (* 18446744073709551615 .cse1 .cse1 .cse1 .cse2) (* .cse1 .cse1) (* .cse0 .cse1 .cse1 .cse1) (* 18446744073709551615 .cse0 .cse1 .cse1)) 18446744073709551616) 0))) is different from true [2024-09-13 04:24:09,283 WARN L293 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-13 04:24:25,433 WARN L293 SmtUtils]: Spent 12.02s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-13 04:24:37,453 WARN L293 SmtUtils]: Spent 12.02s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-13 04:24:49,493 WARN L293 SmtUtils]: Spent 12.04s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-13 04:25:03,818 WARN L293 SmtUtils]: Spent 14.32s on a formula simplification that was a NOOP. DAG size: 13 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-13 04:25:16,047 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_#memory_int#2| c_func_to_recursive_line_30_to_38_0_~y.base) c_func_to_recursive_line_30_to_38_0_~y.offset)) (.cse0 (select (select |c_#memory_int#5| c_func_to_recursive_line_30_to_38_0_~x.base) c_func_to_recursive_line_30_to_38_0_~x.offset)) (.cse1 (select (select |c_#memory_int#3| c_func_to_recursive_line_30_to_38_0_~z.base) c_func_to_recursive_line_30_to_38_0_~z.offset))) (or (and (forall ((|func_to_recursive_line_30_to_38_0_#t~mem5| Int) (|func_to_recursive_line_30_to_38_0_#t~mem7| Int) (|func_to_recursive_line_30_to_38_0_#t~mem8| Int)) (< 0 (mod (+ (* 18446744073709551615 |func_to_recursive_line_30_to_38_0_#t~mem8| |func_to_recursive_line_30_to_38_0_#t~mem7|) (* |c_func_to_recursive_line_30_to_38_0_#t~mem4| |func_to_recursive_line_30_to_38_0_#t~mem5|) 1) 18446744073709551616))) (forall ((|func_to_recursive_line_30_to_38_0_#t~mem5| Int) (|func_to_recursive_line_30_to_38_0_#t~mem7| Int) (|func_to_recursive_line_30_to_38_0_#t~mem8| Int)) (< (mod (+ (* 18446744073709551615 |func_to_recursive_line_30_to_38_0_#t~mem8| |func_to_recursive_line_30_to_38_0_#t~mem7|) (* |c_func_to_recursive_line_30_to_38_0_#t~mem4| |func_to_recursive_line_30_to_38_0_#t~mem5|) 1) 18446744073709551616) 1))) (not (= (mod (+ (* 18446744073709551615 .cse0 .cse1) (* .cse0 .cse1 .cse1) .cse1 (* 18446744073709551615 .cse1 .cse1 .cse2)) 18446744073709551616) 0)) (= (mod (+ (* 18446744073709551615 .cse1 .cse1 .cse1 .cse2) (* .cse1 .cse1) (* .cse0 .cse1 .cse1 .cse1) (* 18446744073709551615 .cse0 .cse1 .cse1)) 18446744073709551616) 0))) is different from true [2024-09-13 04:25:16,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:25:16,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322368200] [2024-09-13 04:25:16,048 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 04:25:16,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332777006] [2024-09-13 04:25:16,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332777006] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 04:25:16,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 04:25:16,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-09-13 04:25:16,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103030880] [2024-09-13 04:25:16,049 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 04:25:16,049 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-13 04:25:16,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:25:16,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-13 04:25:16,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1064, Unknown=6, NotChecked=276, Total=1482 [2024-09-13 04:25:16,052 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 26 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 18 states have internal predecessors, (35), 10 states have call successors, (12), 11 states have call predecessors, (12), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-13 04:25:21,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:25:28,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:25:38,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.42s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:25:39,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:25:39,414 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2024-09-13 04:25:39,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-13 04:25:39,414 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 18 states have internal predecessors, (35), 10 states have call successors, (12), 11 states have call predecessors, (12), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 52 [2024-09-13 04:25:39,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:25:39,415 INFO L225 Difference]: With dead ends: 69 [2024-09-13 04:25:39,416 INFO L226 Difference]: Without dead ends: 67 [2024-09-13 04:25:39,416 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 38.5s TimeCoverageRelationStatistics Valid=243, Invalid=1837, Unknown=6, NotChecked=364, Total=2450 [2024-09-13 04:25:39,417 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 24 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.7s IncrementalHoareTripleChecker+Time [2024-09-13 04:25:39,417 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 317 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 704 Invalid, 2 Unknown, 0 Unchecked, 16.7s Time] [2024-09-13 04:25:39,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-13 04:25:39,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2024-09-13 04:25:39,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 44 states have internal predecessors, (44), 14 states have call successors, (14), 14 states have call predecessors, (14), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-13 04:25:39,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2024-09-13 04:25:39,451 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 52 [2024-09-13 04:25:39,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:25:39,451 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2024-09-13 04:25:39,451 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 18 states have internal predecessors, (35), 10 states have call successors, (12), 11 states have call predecessors, (12), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-13 04:25:39,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:25:39,452 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2024-09-13 04:25:39,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-13 04:25:39,453 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:25:39,453 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:25:39,464 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-13 04:25:39,654 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:25:39,654 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:25:39,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:25:39,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1698874303, now seen corresponding path program 3 times [2024-09-13 04:25:39,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:25:39,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442309403] [2024-09-13 04:25:39,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:25:39,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:25:39,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 04:25:39,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [324614982] [2024-09-13 04:25:39,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 04:25:39,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:25:39,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:25:39,807 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) [2024-09-13 04:25:39,809 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process Killed by 15