./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_fermat1-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e378df2c Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_fermat1-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 82b98e74657ce84706a43470df686c21fc227d1db1df507636ad5f146dee0144 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.contract-modifies-e378df2-m [2024-10-15 15:20:44,049 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-15 15:20:44,123 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-15 15:20:44,129 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-15 15:20:44,131 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-15 15:20:44,154 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-15 15:20:44,155 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-15 15:20:44,155 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-15 15:20:44,155 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-15 15:20:44,156 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-15 15:20:44,156 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-15 15:20:44,156 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-15 15:20:44,156 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-15 15:20:44,157 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-15 15:20:44,157 INFO L153 SettingsManager]: * Use SBE=true [2024-10-15 15:20:44,157 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-15 15:20:44,158 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-15 15:20:44,158 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-15 15:20:44,158 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-15 15:20:44,158 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-15 15:20:44,159 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-15 15:20:44,159 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-15 15:20:44,159 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-15 15:20:44,159 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-15 15:20:44,160 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-15 15:20:44,160 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-15 15:20:44,160 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-15 15:20:44,160 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-15 15:20:44,160 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-15 15:20:44,161 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-15 15:20:44,161 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-15 15:20:44,161 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-15 15:20:44,161 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 15:20:44,162 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-15 15:20:44,162 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-15 15:20:44,162 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-15 15:20:44,166 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-15 15:20:44,166 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-15 15:20:44,167 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-15 15:20:44,167 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-15 15:20:44,167 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-15 15:20:44,169 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-15 15:20:44,169 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 82b98e74657ce84706a43470df686c21fc227d1db1df507636ad5f146dee0144 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-10-15 15:20:44,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-15 15:20:44,403 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-15 15:20:44,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-15 15:20:44,406 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-15 15:20:44,406 INFO L274 PluginConnector]: CDTParser initialized [2024-10-15 15:20:44,407 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_fermat1-ll.c [2024-10-15 15:20:45,684 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-15 15:20:45,836 INFO L384 CDTParser]: Found 1 translation units. [2024-10-15 15:20:45,836 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_fermat1-ll.c [2024-10-15 15:20:45,864 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/802b31248/cc82af375c4d4d51bb9d733458d37392/FLAG48cda782f [2024-10-15 15:20:46,248 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/802b31248/cc82af375c4d4d51bb9d733458d37392 [2024-10-15 15:20:46,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-15 15:20:46,251 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-15 15:20:46,252 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-15 15:20:46,252 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-15 15:20:46,258 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-15 15:20:46,259 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:20:46" (1/1) ... [2024-10-15 15:20:46,260 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2876ba27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:20:46, skipping insertion in model container [2024-10-15 15:20:46,260 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:20:46" (1/1) ... [2024-10-15 15:20:46,280 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-15 15:20:46,416 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_fermat1-ll.c[1101,1114] [2024-10-15 15:20:46,432 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 15:20:46,444 INFO L200 MainTranslator]: Completed pre-run [2024-10-15 15:20:46,453 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_fermat1-ll.c[1101,1114] [2024-10-15 15:20:46,464 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 15:20:46,476 INFO L204 MainTranslator]: Completed translation [2024-10-15 15:20:46,476 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:20:46 WrapperNode [2024-10-15 15:20:46,477 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-15 15:20:46,477 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-15 15:20:46,477 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-15 15:20:46,478 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-15 15:20:46,482 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:20:46" (1/1) ... [2024-10-15 15:20:46,492 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:20:46" (1/1) ... [2024-10-15 15:20:46,499 INFO L138 Inliner]: procedures = 18, calls = 82, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-10-15 15:20:46,499 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-15 15:20:46,500 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-15 15:20:46,500 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-15 15:20:46,500 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-15 15:20:46,509 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:20:46" (1/1) ... [2024-10-15 15:20:46,509 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:20:46" (1/1) ... [2024-10-15 15:20:46,511 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:20:46" (1/1) ... [2024-10-15 15:20:46,529 INFO L175 MemorySlicer]: Split 53 memory accesses to 5 slices as follows [2, 16, 16, 8, 11]. 30 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 8 writes are split as follows [0, 2, 2, 1, 3]. [2024-10-15 15:20:46,530 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:20:46" (1/1) ... [2024-10-15 15:20:46,530 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:20:46" (1/1) ... [2024-10-15 15:20:46,536 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:20:46" (1/1) ... [2024-10-15 15:20:46,537 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:20:46" (1/1) ... [2024-10-15 15:20:46,538 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:20:46" (1/1) ... [2024-10-15 15:20:46,539 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:20:46" (1/1) ... [2024-10-15 15:20:46,541 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-15 15:20:46,542 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-15 15:20:46,542 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-15 15:20:46,542 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-15 15:20:46,543 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:20:46" (1/1) ... [2024-10-15 15:20:46,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 15:20:46,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:20:46,567 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) [2024-10-15 15:20:46,569 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 [2024-10-15 15:20:46,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-15 15:20:46,618 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_36_0 [2024-10-15 15:20:46,619 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_36_0 [2024-10-15 15:20:46,619 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-15 15:20:46,619 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-15 15:20:46,619 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-10-15 15:20:46,619 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-10-15 15:20:46,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-15 15:20:46,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-15 15:20:46,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-15 15:20:46,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-15 15:20:46,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-15 15:20:46,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-15 15:20:46,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-15 15:20:46,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-15 15:20:46,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-15 15:20:46,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-15 15:20:46,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-15 15:20:46,621 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_38_to_43_0 [2024-10-15 15:20:46,622 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_38_to_43_0 [2024-10-15 15:20:46,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-10-15 15:20:46,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-10-15 15:20:46,622 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_46_to_51_0 [2024-10-15 15:20:46,622 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_46_to_51_0 [2024-10-15 15:20:46,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-15 15:20:46,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-15 15:20:46,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-15 15:20:46,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-15 15:20:46,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-15 15:20:46,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-15 15:20:46,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-15 15:20:46,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-15 15:20:46,623 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-15 15:20:46,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-15 15:20:46,731 INFO L238 CfgBuilder]: Building ICFG [2024-10-15 15:20:46,734 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-15 15:20:46,984 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-10-15 15:20:46,984 INFO L287 CfgBuilder]: Performing block encoding [2024-10-15 15:20:47,002 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-15 15:20:47,002 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-15 15:20:47,003 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:20:47 BoogieIcfgContainer [2024-10-15 15:20:47,003 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-15 15:20:47,004 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-15 15:20:47,004 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-15 15:20:47,007 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-15 15:20:47,007 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:20:46" (1/3) ... [2024-10-15 15:20:47,008 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c4a5896 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:20:47, skipping insertion in model container [2024-10-15 15:20:47,008 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:20:46" (2/3) ... [2024-10-15 15:20:47,008 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c4a5896 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:20:47, skipping insertion in model container [2024-10-15 15:20:47,008 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:20:47" (3/3) ... [2024-10-15 15:20:47,009 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_fermat1-ll.c [2024-10-15 15:20:47,023 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-15 15:20:47,023 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-15 15:20:47,068 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-15 15:20:47,073 INFO L333 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;@53f86922, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-15 15:20:47,074 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-15 15:20:47,077 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 33 states have internal predecessors, (38), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-10-15 15:20:47,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-15 15:20:47,082 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:20:47,083 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:20:47,083 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:20:47,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:47,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1756339989, now seen corresponding path program 1 times [2024-10-15 15:20:47,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:20:47,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611498559] [2024-10-15 15:20:47,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:47,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:20:47,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:20:47,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [306431713] [2024-10-15 15:20:47,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:47,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:47,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:20:47,308 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) [2024-10-15 15:20:47,310 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-15 15:20:47,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:47,440 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-10-15 15:20:47,449 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:20:47,493 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 [2024-10-15 15:20:47,522 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 [2024-10-15 15:20:47,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-10-15 15:20:47,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:20:47,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2024-10-15 15:20:47,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2024-10-15 15:20:47,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2024-10-15 15:20:47,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 15:20:47,946 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 15:20:47,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:20:47,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611498559] [2024-10-15 15:20:47,947 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:20:47,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306431713] [2024-10-15 15:20:47,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306431713] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:20:47,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:20:47,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-15 15:20:47,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664540562] [2024-10-15 15:20:47,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:20:47,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-15 15:20:47,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:20:47,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-15 15:20:47,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-15 15:20:47,976 INFO L87 Difference]: Start difference. First operand has 52 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 33 states have internal predecessors, (38), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-15 15:20:49,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-10-15 15:20:49,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:20:49,287 INFO L93 Difference]: Finished difference Result 111 states and 156 transitions. [2024-10-15 15:20:49,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-15 15:20:49,290 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2024-10-15 15:20:49,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:20:49,301 INFO L225 Difference]: With dead ends: 111 [2024-10-15 15:20:49,301 INFO L226 Difference]: Without dead ends: 61 [2024-10-15 15:20:49,303 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-10-15 15:20:49,310 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 14 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-10-15 15:20:49,310 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 316 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-10-15 15:20:49,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-10-15 15:20:49,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2024-10-15 15:20:49,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 39 states have internal predecessors, (40), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2024-10-15 15:20:49,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2024-10-15 15:20:49,346 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 24 [2024-10-15 15:20:49,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:20:49,347 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2024-10-15 15:20:49,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-15 15:20:49,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:49,347 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2024-10-15 15:20:49,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-15 15:20:49,349 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:20:49,349 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:20:49,367 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-15 15:20:49,549 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-10-15 15:20:49,550 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:20:49,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:49,551 INFO L85 PathProgramCache]: Analyzing trace with hash 454145308, now seen corresponding path program 1 times [2024-10-15 15:20:49,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:20:49,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480172612] [2024-10-15 15:20:49,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:49,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:20:49,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:20:49,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1569591165] [2024-10-15 15:20:49,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:49,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:49,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:20:49,613 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) [2024-10-15 15:20:49,614 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-15 15:20:49,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:49,745 INFO L255 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-10-15 15:20:49,748 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:20:49,756 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 [2024-10-15 15:20:49,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-10-15 15:20:49,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:20:49,784 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 [2024-10-15 15:20:50,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2024-10-15 15:20:50,177 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 39 treesize of output 31 [2024-10-15 15:20:50,183 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 60 treesize of output 36 [2024-10-15 15:20:50,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 15:20:50,295 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:20:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 15:20:53,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:20:53,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480172612] [2024-10-15 15:20:53,254 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:20:53,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569591165] [2024-10-15 15:20:53,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569591165] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-15 15:20:53,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:20:53,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 17 [2024-10-15 15:20:53,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535257619] [2024-10-15 15:20:53,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:20:53,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-15 15:20:53,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:20:53,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-15 15:20:53,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2024-10-15 15:20:53,257 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 15:20:53,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:20:53,889 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2024-10-15 15:20:53,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-15 15:20:53,890 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2024-10-15 15:20:53,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:20:53,892 INFO L225 Difference]: With dead ends: 78 [2024-10-15 15:20:53,892 INFO L226 Difference]: Without dead ends: 76 [2024-10-15 15:20:53,893 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2024-10-15 15:20:53,895 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 21 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-15 15:20:53,895 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 330 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-15 15:20:53,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-10-15 15:20:53,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2024-10-15 15:20:53,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 50 states have internal predecessors, (50), 18 states have call successors, (18), 11 states have call predecessors, (18), 11 states have return successors, (21), 15 states have call predecessors, (21), 16 states have call successors, (21) [2024-10-15 15:20:53,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2024-10-15 15:20:53,914 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 34 [2024-10-15 15:20:53,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:20:53,914 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2024-10-15 15:20:53,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 15:20:53,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:53,915 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2024-10-15 15:20:53,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-15 15:20:53,916 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:20:53,916 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:20:53,924 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-15 15:20:54,120 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:54,121 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:20:54,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:54,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1053338002, now seen corresponding path program 1 times [2024-10-15 15:20:54,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:20:54,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111840296] [2024-10-15 15:20:54,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:54,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:20:54,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:20:54,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331508362] [2024-10-15 15:20:54,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:54,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:54,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:20:54,188 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) [2024-10-15 15:20:54,189 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-15 15:20:54,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:54,269 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-10-15 15:20:54,272 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:20:54,334 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 [2024-10-15 15:20:54,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-10-15 15:20:54,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:20:54,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2024-10-15 15:20:54,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2024-10-15 15:20:54,698 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 91 treesize of output 55 [2024-10-15 15:20:54,721 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:20:54,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 57 [2024-10-15 15:20:54,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 15:20:54,807 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:21:04,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:21:04,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111840296] [2024-10-15 15:21:04,138 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:21:04,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331508362] [2024-10-15 15:21:04,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331508362] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:21:04,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:21:04,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-10-15 15:21:04,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406775019] [2024-10-15 15:21:04,139 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:21:04,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-15 15:21:04,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:21:04,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-15 15:21:04,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2024-10-15 15:21:04,141 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand has 17 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-15 15:21:08,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-15 15:21:12,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-15 15:21:17,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-15 15:21:21,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-15 15:21:21,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:21:21,656 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2024-10-15 15:21:21,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-15 15:21:21,656 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 34 [2024-10-15 15:21:21,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:21:21,658 INFO L225 Difference]: With dead ends: 98 [2024-10-15 15:21:21,658 INFO L226 Difference]: Without dead ends: 88 [2024-10-15 15:21:21,659 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2024-10-15 15:21:21,659 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 45 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 15 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.2s IncrementalHoareTripleChecker+Time [2024-10-15 15:21:21,660 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 191 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 707 Invalid, 3 Unknown, 0 Unchecked, 17.2s Time] [2024-10-15 15:21:21,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-10-15 15:21:21,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2024-10-15 15:21:21,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 53 states have internal predecessors, (53), 18 states have call successors, (18), 12 states have call predecessors, (18), 13 states have return successors, (23), 15 states have call predecessors, (23), 16 states have call successors, (23) [2024-10-15 15:21:21,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2024-10-15 15:21:21,683 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 34 [2024-10-15 15:21:21,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:21:21,683 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2024-10-15 15:21:21,683 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-15 15:21:21,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:21:21,684 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2024-10-15 15:21:21,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-15 15:21:21,685 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:21:21,685 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:21:21,698 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-15 15:21:21,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-10-15 15:21:21,886 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:21:21,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:21:21,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1993728975, now seen corresponding path program 1 times [2024-10-15 15:21:21,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:21:21,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439798964] [2024-10-15 15:21:21,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:21:21,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:21:21,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:21:21,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [309594084] [2024-10-15 15:21:21,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:21:21,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:21:21,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:21:21,938 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) [2024-10-15 15:21:21,939 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-15 15:21:22,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:21:22,055 INFO L255 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 111 conjuncts are in the unsatisfiable core [2024-10-15 15:21:22,058 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:21:22,062 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 [2024-10-15 15:21:22,066 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 [2024-10-15 15:21:22,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-10-15 15:21:22,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:21:22,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-10-15 15:21:22,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2024-10-15 15:21:22,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2024-10-15 15:21:22,542 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 60 treesize of output 36 [2024-10-15 15:21:22,631 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 15:21:22,631 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:21:34,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:21:34,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439798964] [2024-10-15 15:21:34,207 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:21:34,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309594084] [2024-10-15 15:21:34,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309594084] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:21:34,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:21:34,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2024-10-15 15:21:34,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294446364] [2024-10-15 15:21:34,208 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:21:34,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-15 15:21:34,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:21:34,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-15 15:21:34,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=254, Unknown=2, NotChecked=0, Total=306 [2024-10-15 15:21:34,209 INFO L87 Difference]: Start difference. First operand 80 states and 94 transitions. Second operand has 13 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (10), 7 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-15 15:21:37,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-15 15:21:41,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-15 15:21:42,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:21:42,597 INFO L93 Difference]: Finished difference Result 164 states and 208 transitions. [2024-10-15 15:21:42,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-15 15:21:42,598 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (10), 7 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2024-10-15 15:21:42,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:21:42,601 INFO L225 Difference]: With dead ends: 164 [2024-10-15 15:21:42,601 INFO L226 Difference]: Without dead ends: 162 [2024-10-15 15:21:42,602 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=139, Invalid=561, Unknown=2, NotChecked=0, Total=702 [2024-10-15 15:21:42,602 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 122 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 81 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2024-10-15 15:21:42,603 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 182 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 420 Invalid, 5 Unknown, 0 Unchecked, 7.8s Time] [2024-10-15 15:21:42,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-10-15 15:21:42,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 156. [2024-10-15 15:21:42,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 93 states have (on average 1.1290322580645162) internal successors, (105), 101 states have internal predecessors, (105), 35 states have call successors, (35), 21 states have call predecessors, (35), 27 states have return successors, (59), 34 states have call predecessors, (59), 32 states have call successors, (59) [2024-10-15 15:21:42,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 199 transitions. [2024-10-15 15:21:42,689 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 199 transitions. Word has length 46 [2024-10-15 15:21:42,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:21:42,689 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 199 transitions. [2024-10-15 15:21:42,689 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (10), 7 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-15 15:21:42,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:21:42,690 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 199 transitions. [2024-10-15 15:21:42,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-10-15 15:21:42,695 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:21:42,696 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:21:42,710 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-15 15:21:42,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:21:42,897 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:21:42,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:21:42,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1900943677, now seen corresponding path program 1 times [2024-10-15 15:21:42,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:21:42,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632190560] [2024-10-15 15:21:42,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:21:42,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:21:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:21:43,514 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:21:43,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:21:43,517 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:21:43,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:21:43,520 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:21:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:21:43,523 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-15 15:21:43,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:21:43,530 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-15 15:21:43,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:21:43,602 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:21:43,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:21:43,616 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-10-15 15:21:43,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:21:43,715 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:21:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:21:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-15 15:21:43,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:21:43,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632190560] [2024-10-15 15:21:43,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632190560] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:21:43,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:21:43,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-10-15 15:21:43,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481769883] [2024-10-15 15:21:43,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:21:43,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-15 15:21:43,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:21:43,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-15 15:21:43,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-10-15 15:21:43,725 INFO L87 Difference]: Start difference. First operand 156 states and 199 transitions. Second operand has 14 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-10-15 15:21:44,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:21:44,218 INFO L93 Difference]: Finished difference Result 244 states and 315 transitions. [2024-10-15 15:21:44,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-15 15:21:44,218 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 58 [2024-10-15 15:21:44,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:21:44,220 INFO L225 Difference]: With dead ends: 244 [2024-10-15 15:21:44,220 INFO L226 Difference]: Without dead ends: 139 [2024-10-15 15:21:44,221 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2024-10-15 15:21:44,222 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 60 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-15 15:21:44,222 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 93 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-15 15:21:44,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-10-15 15:21:44,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2024-10-15 15:21:44,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 85 states have (on average 1.1176470588235294) internal successors, (95), 91 states have internal predecessors, (95), 30 states have call successors, (30), 20 states have call predecessors, (30), 23 states have return successors, (40), 27 states have call predecessors, (40), 27 states have call successors, (40) [2024-10-15 15:21:44,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 165 transitions. [2024-10-15 15:21:44,268 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 165 transitions. Word has length 58 [2024-10-15 15:21:44,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:21:44,269 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 165 transitions. [2024-10-15 15:21:44,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-10-15 15:21:44,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:21:44,269 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 165 transitions. [2024-10-15 15:21:44,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-10-15 15:21:44,270 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:21:44,270 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:21:44,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-15 15:21:44,270 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:21:44,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:21:44,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1638594499, now seen corresponding path program 1 times [2024-10-15 15:21:44,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:21:44,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145313491] [2024-10-15 15:21:44,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:21:44,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:21:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:21:44,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [556181973] [2024-10-15 15:21:44,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:21:44,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:21:44,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:21:44,313 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) [2024-10-15 15:21:44,326 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-15 15:21:44,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:21:44,545 INFO L255 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 155 conjuncts are in the unsatisfiable core [2024-10-15 15:21:44,549 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:21:44,555 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 [2024-10-15 15:21:44,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-10-15 15:21:44,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:21:44,635 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 [2024-10-15 15:21:45,007 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 40 treesize of output 32 [2024-10-15 15:21:46,424 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 67 treesize of output 40 [2024-10-15 15:21:46,434 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 [2024-10-15 15:21:46,783 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 35 [2024-10-15 15:21:46,823 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:21:46,823 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 155 treesize of output 143 [2024-10-15 15:21:47,858 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:21:47,859 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 171 treesize of output 115 [2024-10-15 15:21:48,061 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-15 15:21:48,061 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:21:58,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:21:58,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145313491] [2024-10-15 15:21:58,170 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:21:58,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556181973] [2024-10-15 15:21:58,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556181973] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:21:58,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:21:58,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2024-10-15 15:21:58,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891975509] [2024-10-15 15:21:58,171 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:21:58,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-15 15:21:58,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:21:58,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-15 15:21:58,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2024-10-15 15:21:58,173 INFO L87 Difference]: Start difference. First operand 139 states and 165 transitions. Second operand has 28 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 11 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-15 15:22:02,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-15 15:22:06,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-15 15:22:10,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-15 15:22:14,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-15 15:22:18,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-15 15:22:25,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-15 15:22:29,238 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] [2024-10-15 15:22:30,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:22:30,048 INFO L93 Difference]: Finished difference Result 205 states and 248 transitions. [2024-10-15 15:22:30,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-15 15:22:30,049 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 11 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Word has length 58 [2024-10-15 15:22:30,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:22:30,051 INFO L225 Difference]: With dead ends: 205 [2024-10-15 15:22:30,051 INFO L226 Difference]: Without dead ends: 201 [2024-10-15 15:22:30,056 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=279, Invalid=2477, Unknown=0, NotChecked=0, Total=2756 [2024-10-15 15:22:30,056 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 118 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 1574 mSolverCounterSat, 39 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 1622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1574 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.6s IncrementalHoareTripleChecker+Time [2024-10-15 15:22:30,056 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 450 Invalid, 1622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1574 Invalid, 9 Unknown, 0 Unchecked, 29.6s Time] [2024-10-15 15:22:30,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-10-15 15:22:30,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2024-10-15 15:22:30,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 122 states have (on average 1.1229508196721312) internal successors, (137), 129 states have internal predecessors, (137), 42 states have call successors, (42), 28 states have call predecessors, (42), 33 states have return successors, (60), 40 states have call predecessors, (60), 38 states have call successors, (60) [2024-10-15 15:22:30,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 239 transitions. [2024-10-15 15:22:30,158 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 239 transitions. Word has length 58 [2024-10-15 15:22:30,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:22:30,158 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 239 transitions. [2024-10-15 15:22:30,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 11 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-15 15:22:30,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:30,159 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 239 transitions. [2024-10-15 15:22:30,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-10-15 15:22:30,159 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:22:30,159 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:22:30,166 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-15 15:22:30,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-15 15:22:30,364 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:22:30,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:30,364 INFO L85 PathProgramCache]: Analyzing trace with hash 336534583, now seen corresponding path program 2 times [2024-10-15 15:22:30,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:22:30,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285828166] [2024-10-15 15:22:30,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:22:30,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:22:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:22:30,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574530229] [2024-10-15 15:22:30,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 15:22:30,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:22:30,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:22:30,394 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) [2024-10-15 15:22:30,395 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-15 15:22:30,565 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 15:22:30,566 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:22:30,570 INFO L255 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 180 conjuncts are in the unsatisfiable core [2024-10-15 15:22:30,575 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:22:30,582 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 [2024-10-15 15:22:30,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-10-15 15:22:30,705 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 15 treesize of output 11 [2024-10-15 15:22:30,719 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 [2024-10-15 15:22:31,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2024-10-15 15:22:32,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:22:32,135 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 56 treesize of output 40 [2024-10-15 15:22:32,468 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 40 treesize of output 32 [2024-10-15 15:22:32,483 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:22:32,484 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 129 treesize of output 121 [2024-10-15 15:22:32,494 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:22:32,495 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 149 treesize of output 97 [2024-10-15 15:22:34,443 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 5 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-15 15:22:34,443 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:22:43,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:22:43,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285828166] [2024-10-15 15:22:43,278 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:22:43,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574530229] [2024-10-15 15:22:43,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574530229] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:22:43,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:22:43,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-10-15 15:22:43,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577851510] [2024-10-15 15:22:43,279 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:22:43,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-15 15:22:43,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:22:43,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-15 15:22:43,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1139, Unknown=0, NotChecked=0, Total=1260 [2024-10-15 15:22:43,281 INFO L87 Difference]: Start difference. First operand 198 states and 239 transitions. Second operand has 27 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 11 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-10-15 15:22:47,351 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] [2024-10-15 15:22:51,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-15 15:22:57,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-15 15:23:04,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-15 15:23:08,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-15 15:23:11,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-15 15:23:12,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:23:12,012 INFO L93 Difference]: Finished difference Result 217 states and 265 transitions. [2024-10-15 15:23:12,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-15 15:23:12,013 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 11 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 70 [2024-10-15 15:23:12,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:23:12,015 INFO L225 Difference]: With dead ends: 217 [2024-10-15 15:23:12,016 INFO L226 Difference]: Without dead ends: 215 [2024-10-15 15:23:12,017 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=224, Invalid=2032, Unknown=0, NotChecked=0, Total=2256 [2024-10-15 15:23:12,018 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 115 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 45 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.4s IncrementalHoareTripleChecker+Time [2024-10-15 15:23:12,018 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 402 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1385 Invalid, 12 Unknown, 0 Unchecked, 27.4s Time] [2024-10-15 15:23:12,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-10-15 15:23:12,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 200. [2024-10-15 15:23:12,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 123 states have (on average 1.1219512195121952) internal successors, (138), 130 states have internal predecessors, (138), 42 states have call successors, (42), 28 states have call predecessors, (42), 34 states have return successors, (64), 41 states have call predecessors, (64), 38 states have call successors, (64) [2024-10-15 15:23:12,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 244 transitions. [2024-10-15 15:23:12,118 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 244 transitions. Word has length 70 [2024-10-15 15:23:12,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:23:12,118 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 244 transitions. [2024-10-15 15:23:12,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 11 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-10-15 15:23:12,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:23:12,118 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 244 transitions. [2024-10-15 15:23:12,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-10-15 15:23:12,119 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:23:12,119 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:23:12,126 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-15 15:23:12,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:23:12,320 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:23:12,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:23:12,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1164971733, now seen corresponding path program 3 times [2024-10-15 15:23:12,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:23:12,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519175820] [2024-10-15 15:23:12,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:23:12,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:23:12,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:23:12,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1862881855] [2024-10-15 15:23:12,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 15:23:12,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:23:12,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:23:12,375 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:23:12,380 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-15 15:23:13,305 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-10-15 15:23:13,305 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:23:13,312 WARN L253 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 281 conjuncts are in the unsatisfiable core [2024-10-15 15:23:13,332 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:23:13,340 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 [2024-10-15 15:23:13,379 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 [2024-10-15 15:23:13,382 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 [2024-10-15 15:23:13,848 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 [2024-10-15 15:23:14,252 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 [2024-10-15 15:23:15,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2024-10-15 15:23:15,309 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 [2024-10-15 15:23:15,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-10-15 15:23:15,552 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 22 proven. 40 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-10-15 15:23:15,552 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:23:18,231 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 285 treesize of output 281 [2024-10-15 15:23:54,805 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 284 treesize of output 280 [2024-10-15 15:23:54,832 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 284 treesize of output 280 [2024-10-15 15:23:56,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:23:56,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519175820] [2024-10-15 15:23:56,189 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:23:56,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862881855] [2024-10-15 15:23:56,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862881855] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:23:56,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:23:56,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-10-15 15:23:56,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268168569] [2024-10-15 15:23:56,189 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:23:56,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-15 15:23:56,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:23:56,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-15 15:23:56,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1024, Unknown=4, NotChecked=0, Total=1122 [2024-10-15 15:23:56,191 INFO L87 Difference]: Start difference. First operand 200 states and 244 transitions. Second operand has 25 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 9 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) [2024-10-15 15:24:01,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:24:01,921 INFO L93 Difference]: Finished difference Result 285 states and 373 transitions. [2024-10-15 15:24:01,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-10-15 15:24:01,921 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 9 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) Word has length 82 [2024-10-15 15:24:01,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:24:01,924 INFO L225 Difference]: With dead ends: 285 [2024-10-15 15:24:01,925 INFO L226 Difference]: Without dead ends: 283 [2024-10-15 15:24:01,926 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 42.3s TimeCoverageRelationStatistics Valid=308, Invalid=2994, Unknown=4, NotChecked=0, Total=3306 [2024-10-15 15:24:01,927 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 139 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 108 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 1598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:24:01,927 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 273 Invalid, 1598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1482 Invalid, 8 Unknown, 0 Unchecked, 2.1s Time] [2024-10-15 15:24:01,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2024-10-15 15:24:02,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 279. [2024-10-15 15:24:02,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 170 states have (on average 1.1235294117647059) internal successors, (191), 180 states have internal predecessors, (191), 58 states have call successors, (58), 38 states have call predecessors, (58), 50 states have return successors, (111), 60 states have call predecessors, (111), 53 states have call successors, (111) [2024-10-15 15:24:02,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 360 transitions. [2024-10-15 15:24:02,080 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 360 transitions. Word has length 82 [2024-10-15 15:24:02,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:24:02,081 INFO L471 AbstractCegarLoop]: Abstraction has 279 states and 360 transitions. [2024-10-15 15:24:02,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 9 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) [2024-10-15 15:24:02,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:24:02,081 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 360 transitions. [2024-10-15 15:24:02,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-10-15 15:24:02,082 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:24:02,082 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:24:02,099 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-15 15:24:02,282 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:24:02,282 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:24:02,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:24:02,283 INFO L85 PathProgramCache]: Analyzing trace with hash 993203871, now seen corresponding path program 4 times [2024-10-15 15:24:02,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:24:02,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63478855] [2024-10-15 15:24:02,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:24:02,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:24:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:24:02,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [989691170] [2024-10-15 15:24:02,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 15:24:02,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:24:02,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:24:02,335 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:24:02,336 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-15 15:24:02,802 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 15:24:02,802 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:24:02,809 WARN L253 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 331 conjuncts are in the unsatisfiable core [2024-10-15 15:24:02,814 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:24:02,819 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 [2024-10-15 15:24:03,161 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 77 treesize of output 63 [2024-10-15 15:24:03,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 40 [2024-10-15 15:24:03,223 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 40 treesize of output 36 [2024-10-15 15:24:07,369 WARN L873 $PredicateComparison]: unable to prove that (exists ((v_arrayElimCell_41 Int) (|v_func_to_recursive_line_38_to_43_0_#in~u.base_BEFORE_CALL_10| Int) (|v_func_to_recursive_line_38_to_43_0_#in~u.offset_BEFORE_CALL_10| Int) (v_arrayElimCell_40 Int) (|v_func_to_recursive_line_38_to_43_0_#in~A.base_BEFORE_CALL_10| Int) (|v_func_to_recursive_line_38_to_43_0_#in~A.offset_BEFORE_CALL_10| Int)) (let ((.cse0 (select (select |c_#memory_int#1| |v_func_to_recursive_line_38_to_43_0_#in~u.base_BEFORE_CALL_10|) |v_func_to_recursive_line_38_to_43_0_#in~u.offset_BEFORE_CALL_10|))) (= (* .cse0 .cse0) (+ (* v_arrayElimCell_40 v_arrayElimCell_40) (* (select (select |c_#memory_int#3| |v_func_to_recursive_line_38_to_43_0_#in~A.base_BEFORE_CALL_10|) |v_func_to_recursive_line_38_to_43_0_#in~A.offset_BEFORE_CALL_10|) 4) (* 4 v_arrayElimCell_41) (* 2 v_arrayElimCell_40) (* .cse0 2))))) is different from true [2024-10-15 15:24:18,008 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 77 treesize of output 65 [2024-10-15 15:24:18,135 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 [2024-10-15 15:24:19,284 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:24:19,285 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 93 treesize of output 69 [2024-10-15 15:24:19,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2024-10-15 15:24:19,305 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:24:19,305 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 51 treesize of output 51 [2024-10-15 15:24:23,739 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 16 proven. 55 refuted. 0 times theorem prover too weak. 43 trivial. 38 not checked. [2024-10-15 15:24:23,740 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:24:40,983 WARN L286 SmtUtils]: Spent 5.41s on a formula simplification that was a NOOP. DAG size: 89 (called from [L 298] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-10-15 15:24:54,008 WARN L286 SmtUtils]: Spent 7.80s on a formula simplification. DAG size of input: 161 DAG size of output: 141 (called from [L 275] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition)