./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_fermat2-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_fermat2-ll.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9ae1eacd45e2434e505261d43bb17259916099964617682d271ef41fa1c24d0c --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-12 16:37:31,598 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 16:37:31,678 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 16:37:31,683 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 16:37:31,684 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 16:37:31,714 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 16:37:31,715 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 16:37:31,715 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 16:37:31,716 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 16:37:31,718 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 16:37:31,720 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 16:37:31,721 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 16:37:31,721 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 16:37:31,722 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 16:37:31,722 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 16:37:31,722 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 16:37:31,722 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 16:37:31,723 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 16:37:31,723 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 16:37:31,723 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 16:37:31,723 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 16:37:31,726 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 16:37:31,726 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 16:37:31,726 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 16:37:31,726 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 16:37:31,727 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 16:37:31,727 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 16:37:31,727 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 16:37:31,727 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 16:37:31,728 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 16:37:31,728 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 16:37:31,728 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 16:37:31,728 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 16:37:31,729 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 16:37:31,729 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 16:37:31,732 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 16:37:31,733 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 16:37:31,733 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 16:37:31,733 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 16:37:31,733 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 16:37:31,733 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 16:37:31,734 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 16:37:31,734 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ae1eacd45e2434e505261d43bb17259916099964617682d271ef41fa1c24d0c Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 16:37:32,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 16:37:32,073 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 16:37:32,076 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 16:37:32,077 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 16:37:32,078 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 16:37:32,079 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_fermat2-ll.c [2024-09-12 16:37:33,586 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 16:37:33,802 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 16:37:33,803 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_fermat2-ll.c [2024-09-12 16:37:33,810 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/ce84d8552/3b1fb86341794e51bdfc86b126992463/FLAG3e883026a [2024-09-12 16:37:33,826 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/ce84d8552/3b1fb86341794e51bdfc86b126992463 [2024-09-12 16:37:33,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 16:37:33,830 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 16:37:33,831 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 16:37:33,831 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 16:37:33,841 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 16:37:33,842 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 04:37:33" (1/1) ... [2024-09-12 16:37:33,843 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a819a23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:37:33, skipping insertion in model container [2024-09-12 16:37:33,845 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 04:37:33" (1/1) ... [2024-09-12 16:37:33,867 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 16:37:34,026 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_fermat2-ll.c[1060,1073] [2024-09-12 16:37:34,053 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 16:37:34,068 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 16:37:34,086 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_fermat2-ll.c[1060,1073] [2024-09-12 16:37:34,099 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 16:37:34,122 INFO L204 MainTranslator]: Completed translation [2024-09-12 16:37:34,123 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:37:34 WrapperNode [2024-09-12 16:37:34,123 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 16:37:34,124 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 16:37:34,124 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 16:37:34,125 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 16:37:34,132 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:37:34" (1/1) ... [2024-09-12 16:37:34,144 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:37:34" (1/1) ... [2024-09-12 16:37:34,150 INFO L138 Inliner]: procedures = 16, calls = 59, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 16:37:34,151 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 16:37:34,151 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 16:37:34,152 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 16:37:34,152 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 16:37:34,163 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:37:34" (1/1) ... [2024-09-12 16:37:34,164 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:37:34" (1/1) ... [2024-09-12 16:37:34,166 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:37:34" (1/1) ... [2024-09-12 16:37:34,189 INFO L175 MemorySlicer]: Split 36 memory accesses to 5 slices as follows [2, 10, 10, 8, 6]. 28 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 8 writes are split as follows [0, 2, 2, 3, 1]. [2024-09-12 16:37:34,190 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:37:34" (1/1) ... [2024-09-12 16:37:34,190 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:37:34" (1/1) ... [2024-09-12 16:37:34,199 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:37:34" (1/1) ... [2024-09-12 16:37:34,201 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:37:34" (1/1) ... [2024-09-12 16:37:34,202 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:37:34" (1/1) ... [2024-09-12 16:37:34,203 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:37:34" (1/1) ... [2024-09-12 16:37:34,207 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 16:37:34,210 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 16:37:34,210 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 16:37:34,210 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 16:37:34,212 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:37:34" (1/1) ... [2024-09-12 16:37:34,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 16:37:34,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:37:34,243 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-12 16:37:34,246 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-12 16:37:34,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 16:37:34,292 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-12 16:37:34,292 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-12 16:37:34,292 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 16:37:34,293 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 16:37:34,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 16:37:34,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-12 16:37:34,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-12 16:37:34,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-12 16:37:34,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-12 16:37:34,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-12 16:37:34,295 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_42_0 [2024-09-12 16:37:34,295 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_42_0 [2024-09-12 16:37:34,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-12 16:37:34,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-12 16:37:34,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-12 16:37:34,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-12 16:37:34,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-12 16:37:34,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 16:37:34,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 16:37:34,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 16:37:34,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 16:37:34,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-12 16:37:34,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-12 16:37:34,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-12 16:37:34,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-12 16:37:34,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-12 16:37:34,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 16:37:34,299 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 16:37:34,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-12 16:37:34,398 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 16:37:34,400 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 16:37:34,631 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-12 16:37:34,631 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 16:37:34,659 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 16:37:34,660 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-12 16:37:34,660 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 04:37:34 BoogieIcfgContainer [2024-09-12 16:37:34,660 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 16:37:34,662 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 16:37:34,664 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 16:37:34,666 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 16:37:34,667 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 04:37:33" (1/3) ... [2024-09-12 16:37:34,667 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6468ef2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 04:37:34, skipping insertion in model container [2024-09-12 16:37:34,668 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:37:34" (2/3) ... [2024-09-12 16:37:34,668 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6468ef2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 04:37:34, skipping insertion in model container [2024-09-12 16:37:34,669 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 04:37:34" (3/3) ... [2024-09-12 16:37:34,670 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_fermat2-ll.c [2024-09-12 16:37:34,686 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 16:37:34,686 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 16:37:34,746 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 16:37:34,752 INFO L336 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6a340142, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 16:37:34,753 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 16:37:34,756 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-12 16:37:34,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-12 16:37:34,764 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:37:34,765 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:37:34,765 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:37:34,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:37:34,772 INFO L85 PathProgramCache]: Analyzing trace with hash -896464560, now seen corresponding path program 1 times [2024-09-12 16:37:34,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:37:34,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144896725] [2024-09-12 16:37:34,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:37:34,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:37:34,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:37:34,998 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:37:35,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:37:35,016 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:37:35,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:37:35,028 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 16:37:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:37:35,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 16:37:35,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:37:35,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144896725] [2024-09-12 16:37:35,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144896725] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 16:37:35,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 16:37:35,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-12 16:37:35,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642851588] [2024-09-12 16:37:35,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:37:35,048 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-12 16:37:35,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:37:35,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-12 16:37:35,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 16:37:35,073 INFO L87 Difference]: Start difference. First operand has 35 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 16:37:35,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:37:35,100 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2024-09-12 16:37:35,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-12 16:37:35,104 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-09-12 16:37:35,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:37:35,111 INFO L225 Difference]: With dead ends: 64 [2024-09-12 16:37:35,111 INFO L226 Difference]: Without dead ends: 31 [2024-09-12 16:37:35,114 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 16:37:35,117 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 16:37:35,118 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 16:37:35,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-12 16:37:35,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-12 16:37:35,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-12 16:37:35,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-09-12 16:37:35,156 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2024-09-12 16:37:35,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:37:35,157 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-09-12 16:37:35,158 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 16:37:35,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:37:35,160 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-09-12 16:37:35,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-12 16:37:35,161 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:37:35,161 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:37:35,163 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 16:37:35,163 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:37:35,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:37:35,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1783747884, now seen corresponding path program 1 times [2024-09-12 16:37:35,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:37:35,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523023312] [2024-09-12 16:37:35,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:37:35,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:37:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:37:35,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [714207784] [2024-09-12 16:37:35,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:37:35,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:37:35,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:37:35,273 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:37:35,275 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 16:37:35,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:37:35,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-09-12 16:37:35,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:37:35,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-12 16:37:35,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-12 16:37:35,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-09-12 16:37:35,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 16:37:35,800 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 [2024-09-12 16:37:35,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2024-09-12 16:37:35,824 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 [2024-09-12 16:37:35,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 16:37:35,970 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 16:37:35,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:37:35,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523023312] [2024-09-12 16:37:35,971 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:37:35,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714207784] [2024-09-12 16:37:35,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714207784] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 16:37:35,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 16:37:35,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-12 16:37:35,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251614797] [2024-09-12 16:37:35,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:37:35,975 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 16:37:35,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:37:35,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 16:37:35,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-12 16:37:35,978 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 16:37:40,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-12 16:37:40,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:37:40,601 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2024-09-12 16:37:40,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 16:37:40,602 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2024-09-12 16:37:40,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:37:40,603 INFO L225 Difference]: With dead ends: 46 [2024-09-12 16:37:40,604 INFO L226 Difference]: Without dead ends: 44 [2024-09-12 16:37:40,604 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-12 16:37:40,605 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 14 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-09-12 16:37:40,606 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 146 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 97 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2024-09-12 16:37:40,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-09-12 16:37:40,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2024-09-12 16:37:40,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 28 states have internal predecessors, (30), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-12 16:37:40,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2024-09-12 16:37:40,621 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 24 [2024-09-12 16:37:40,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:37:40,621 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2024-09-12 16:37:40,621 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 16:37:40,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:37:40,622 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2024-09-12 16:37:40,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-12 16:37:40,623 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:37:40,623 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:37:40,633 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-12 16:37:40,827 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:37:40,828 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:37:40,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:37:40,828 INFO L85 PathProgramCache]: Analyzing trace with hash -391677542, now seen corresponding path program 1 times [2024-09-12 16:37:40,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:37:40,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106245921] [2024-09-12 16:37:40,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:37:40,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:37:40,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:37:40,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131724524] [2024-09-12 16:37:40,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:37:40,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:37:40,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:37:40,880 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:37:40,882 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 16:37:41,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:37:41,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-12 16:37:41,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:37:41,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-12 16:37:41,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-09-12 16:37:41,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 16:37:45,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-09-12 16:37:45,295 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 40 [2024-09-12 16:37:45,752 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 106 treesize of output 70 [2024-09-12 16:37:45,799 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 16:37:45,799 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 76 treesize of output 72 [2024-09-12 16:37:45,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 16:37:45,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:37:50,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:37:50,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106245921] [2024-09-12 16:37:50,405 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:37:50,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131724524] [2024-09-12 16:37:50,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131724524] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:37:50,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:37:50,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-12 16:37:50,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718559153] [2024-09-12 16:37:50,406 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 16:37:50,406 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-12 16:37:50,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:37:50,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-12 16:37:50,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=399, Unknown=1, NotChecked=0, Total=462 [2024-09-12 16:37:50,408 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 16 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 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) [2024-09-12 16:37:54,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-12 16:38:03,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-12 16:38:04,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-12 16:38:09,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.50s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-12 16:38:09,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:38:09,353 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2024-09-12 16:38:09,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-12 16:38:09,354 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 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 [2024-09-12 16:38:09,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:38:09,355 INFO L225 Difference]: With dead ends: 56 [2024-09-12 16:38:09,355 INFO L226 Difference]: Without dead ends: 46 [2024-09-12 16:38:09,356 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=124, Invalid=866, Unknown=2, NotChecked=0, Total=992 [2024-09-12 16:38:09,357 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 33 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 6 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2024-09-12 16:38:09,357 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 119 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 367 Invalid, 3 Unknown, 0 Unchecked, 14.5s Time] [2024-09-12 16:38:09,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-12 16:38:09,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2024-09-12 16:38:09,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-12 16:38:09,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2024-09-12 16:38:09,374 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 34 [2024-09-12 16:38:09,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:38:09,374 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2024-09-12 16:38:09,375 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 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) [2024-09-12 16:38:09,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:38:09,375 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2024-09-12 16:38:09,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-12 16:38:09,376 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:38:09,376 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:38:09,394 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-12 16:38:09,577 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:38:09,577 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:38:09,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:38:09,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1584173507, now seen corresponding path program 1 times [2024-09-12 16:38:09,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:38:09,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814610173] [2024-09-12 16:38:09,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:38:09,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:38:09,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:38:09,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1698167253] [2024-09-12 16:38:09,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:38:09,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:38:09,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:38:09,643 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:38:09,645 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 16:38:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:38:09,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 115 conjuncts are in the unsatisfiable core [2024-09-12 16:38:09,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:38:09,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-12 16:38:09,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-09-12 16:38:09,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 16:38:09,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-12 16:38:10,129 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 57 treesize of output 45 [2024-09-12 16:38:10,133 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 70 treesize of output 46 [2024-09-12 16:38:10,221 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 [2024-09-12 16:38:10,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2024-09-12 16:38:10,233 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 [2024-09-12 16:38:10,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 16:38:10,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:38:13,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 16:38:13,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:38:13,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814610173] [2024-09-12 16:38:13,649 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:38:13,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698167253] [2024-09-12 16:38:13,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698167253] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:38:13,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:38:13,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2024-09-12 16:38:13,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737386557] [2024-09-12 16:38:13,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:38:13,650 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-12 16:38:13,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:38:13,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-12 16:38:13,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-12 16:38:13,651 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 13 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 states have internal predecessors, (29), 7 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 16:38:15,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-12 16:38:17,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-12 16:38:19,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:38:19,442 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2024-09-12 16:38:19,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-12 16:38:19,444 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 states have internal predecessors, (29), 7 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2024-09-12 16:38:19,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:38:19,447 INFO L225 Difference]: With dead ends: 79 [2024-09-12 16:38:19,447 INFO L226 Difference]: Without dead ends: 73 [2024-09-12 16:38:19,447 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2024-09-12 16:38:19,450 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 43 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-09-12 16:38:19,451 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 183 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-09-12 16:38:19,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-12 16:38:19,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 48. [2024-09-12 16:38:19,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-12 16:38:19,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2024-09-12 16:38:19,495 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 35 [2024-09-12 16:38:19,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:38:19,495 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2024-09-12 16:38:19,495 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 states have internal predecessors, (29), 7 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 16:38:19,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:38:19,496 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2024-09-12 16:38:19,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-12 16:38:19,497 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:38:19,497 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:38:19,508 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-12 16:38:19,698 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:38:19,698 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:38:19,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:38:19,699 INFO L85 PathProgramCache]: Analyzing trace with hash 987710829, now seen corresponding path program 1 times [2024-09-12 16:38:19,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:38:19,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065748559] [2024-09-12 16:38:19,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:38:19,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:38:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:38:19,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [108887029] [2024-09-12 16:38:19,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:38:19,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:38:19,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:38:19,762 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:38:19,764 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 16:38:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:38:20,026 WARN L260 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 147 conjuncts are in the unsatisfiable core [2024-09-12 16:38:20,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:38:20,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-12 16:38:20,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-09-12 16:38:20,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 16:38:20,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-12 16:38:20,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-09-12 16:38:20,240 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 40 [2024-09-12 16:38:38,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2024-09-12 16:38:38,089 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 116 treesize of output 76 [2024-09-12 16:38:38,793 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 94 treesize of output 62 [2024-09-12 16:38:38,809 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 155 treesize of output 99 [2024-09-12 16:38:39,944 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 16:38:39,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 128 [2024-09-12 16:38:42,834 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 16:38:42,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:38:48,293 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 142 treesize of output 110 [2024-09-12 16:38:48,306 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 110 treesize of output 74 [2024-09-12 16:38:48,322 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 74 treesize of output 66 [2024-09-12 16:38:52,365 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse8 (select (select |c_old(#memory_int#1)| |c_func_to_recursive_line_33_to_42_0_#in~v.base|) |c_func_to_recursive_line_33_to_42_0_#in~v.offset|))) (let ((.cse2 (* .cse8 .cse8)) (.cse1 (select (select |c_old(#memory_int#2)| |c_func_to_recursive_line_33_to_42_0_#in~u.base|) |c_func_to_recursive_line_33_to_42_0_#in~u.offset|)) (.cse0 (forall ((|v_func_to_recursive_line_33_to_42_0_#in~A.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_33_to_42_0_#in~u.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_33_to_42_0_#in~A.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_33_to_42_0_#in~u.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_33_to_42_0_#in~v.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_33_to_42_0_#in~v.offset_BEFORE_CALL_4| Int)) (let ((.cse9 (select (select |c_#memory_int#2| |v_func_to_recursive_line_33_to_42_0_#in~u.base_BEFORE_CALL_4|) |v_func_to_recursive_line_33_to_42_0_#in~u.offset_BEFORE_CALL_4|)) (.cse10 (select (select |c_#memory_int#1| |v_func_to_recursive_line_33_to_42_0_#in~v.base_BEFORE_CALL_4|) |v_func_to_recursive_line_33_to_42_0_#in~v.offset_BEFORE_CALL_4|))) (= (+ (* .cse9 2) (* (select (select |c_#memory_int#4| |v_func_to_recursive_line_33_to_42_0_#in~A.base_BEFORE_CALL_4|) |v_func_to_recursive_line_33_to_42_0_#in~A.offset_BEFORE_CALL_4|) 4) (* .cse10 .cse10)) (+ (* .cse9 .cse9) (* 2 .cse10))))))) (and (or (= (select (select |c_old(#memory_int#3)| |c_func_to_recursive_line_33_to_42_0_#in~r.base|) |c_func_to_recursive_line_33_to_42_0_#in~r.offset|) 0) .cse0) (or (= (mod (+ (* .cse1 .cse1) .cse2) 2) 0) .cse0) (forall ((|v_func_to_recursive_line_33_to_42_0_#in~A.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_33_to_42_0_#in~u.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_33_to_42_0_#in~A.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_33_to_42_0_#in~u.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_33_to_42_0_#in~v.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_33_to_42_0_#in~v.offset_BEFORE_CALL_4| Int)) (let ((.cse5 (* (select (select |c_#memory_int#4| |v_func_to_recursive_line_33_to_42_0_#in~A.base_BEFORE_CALL_4|) |v_func_to_recursive_line_33_to_42_0_#in~A.offset_BEFORE_CALL_4|) 4))) (or (not (let ((.cse4 (select (select |c_old(#memory_int#2)| |v_func_to_recursive_line_33_to_42_0_#in~u.base_BEFORE_CALL_4|) |v_func_to_recursive_line_33_to_42_0_#in~u.offset_BEFORE_CALL_4|)) (.cse3 (select (select |c_old(#memory_int#1)| |v_func_to_recursive_line_33_to_42_0_#in~v.base_BEFORE_CALL_4|) |v_func_to_recursive_line_33_to_42_0_#in~v.offset_BEFORE_CALL_4|))) (= (+ (* .cse3 2) (* .cse4 .cse4)) (+ .cse5 (* 2 .cse4) (* .cse3 .cse3))))) (let ((.cse6 (select (select |c_#memory_int#2| |v_func_to_recursive_line_33_to_42_0_#in~u.base_BEFORE_CALL_4|) |v_func_to_recursive_line_33_to_42_0_#in~u.offset_BEFORE_CALL_4|)) (.cse7 (select (select |c_#memory_int#1| |v_func_to_recursive_line_33_to_42_0_#in~v.base_BEFORE_CALL_4|) |v_func_to_recursive_line_33_to_42_0_#in~v.offset_BEFORE_CALL_4|))) (= (+ (* .cse6 2) .cse5 (* .cse7 .cse7)) (+ (* .cse6 .cse6) (* 2 .cse7))))))) (or (< (+ (div (+ .cse2 (* (- 1) .cse1 .cse1)) 2) (* 2 (select (select |c_#memory_int#4| |c_func_to_recursive_line_33_to_42_0_#in~A.base|) |c_func_to_recursive_line_33_to_42_0_#in~A.offset|)) .cse1) (+ .cse8 1)) .cse0)))) is different from false [2024-09-12 16:38:53,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:38:53,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065748559] [2024-09-12 16:38:53,287 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:38:53,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108887029] [2024-09-12 16:38:53,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108887029] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:38:53,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:38:53,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-12 16:38:53,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416579012] [2024-09-12 16:38:53,288 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 16:38:53,288 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-12 16:38:53,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:38:53,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-12 16:38:53,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=946, Unknown=3, NotChecked=62, Total=1122 [2024-09-12 16:38:53,290 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 25 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 8 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-12 16:38:57,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-12 16:39:09,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:39:09,598 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2024-09-12 16:39:09,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-12 16:39:09,598 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 8 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Word has length 47 [2024-09-12 16:39:09,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:39:09,600 INFO L225 Difference]: With dead ends: 57 [2024-09-12 16:39:09,600 INFO L226 Difference]: Without dead ends: 51 [2024-09-12 16:39:09,602 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 37.0s TimeCoverageRelationStatistics Valid=226, Invalid=2031, Unknown=3, NotChecked=92, Total=2352 [2024-09-12 16:39:09,602 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2024-09-12 16:39:09,603 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 151 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 708 Invalid, 1 Unknown, 0 Unchecked, 6.2s Time] [2024-09-12 16:39:09,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-12 16:39:09,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-09-12 16:39:09,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.0625) internal successors, (34), 33 states have internal predecessors, (34), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-12 16:39:09,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2024-09-12 16:39:09,635 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 47 [2024-09-12 16:39:09,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:39:09,635 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2024-09-12 16:39:09,635 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 8 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-12 16:39:09,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:09,636 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2024-09-12 16:39:09,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-12 16:39:09,637 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:39:09,637 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:39:09,653 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-12 16:39:09,838 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:39:09,838 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:39:09,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:09,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1805359279, now seen corresponding path program 1 times [2024-09-12 16:39:09,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:39:09,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55583930] [2024-09-12 16:39:09,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:39:09,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:39:09,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:39:09,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455192309] [2024-09-12 16:39:09,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:39:09,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:39:09,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:39:09,875 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:39:09,877 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 16:39:09,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:09,975 WARN L260 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 147 conjuncts are in the unsatisfiable core [2024-09-12 16:39:09,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:39:09,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-12 16:39:10,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-12 16:39:10,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-09-12 16:39:10,071 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 15 treesize of output 11 [2024-09-12 16:39:10,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-09-12 16:39:10,142 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 40 [2024-09-12 16:39:11,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-12 16:39:12,386 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 128 treesize of output 84 [2024-09-12 16:39:12,454 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 16:39:12,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 112 treesize of output 124 [2024-09-12 16:39:12,683 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 16:39:12,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:39:17,653 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 138 treesize of output 102 [2024-09-12 16:39:17,663 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 102 treesize of output 70 [2024-09-12 16:39:17,674 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 70 treesize of output 62 [2024-09-12 16:39:28,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:39:28,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55583930] [2024-09-12 16:39:28,547 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:39:28,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455192309] [2024-09-12 16:39:28,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455192309] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:39:28,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:39:28,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-12 16:39:28,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108546472] [2024-09-12 16:39:28,548 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 16:39:28,549 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-12 16:39:28,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:39:28,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-12 16:39:28,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=888, Unknown=1, NotChecked=0, Total=992 [2024-09-12 16:39:28,550 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 23 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 8 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-12 16:39:32,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-12 16:39:36,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-12 16:39:40,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-12 16:39:43,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:39:43,829 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2024-09-12 16:39:43,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-12 16:39:43,830 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 8 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Word has length 47 [2024-09-12 16:39:43,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:39:43,831 INFO L225 Difference]: With dead ends: 59 [2024-09-12 16:39:43,831 INFO L226 Difference]: Without dead ends: 53 [2024-09-12 16:39:43,832 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=205, Invalid=1864, Unknown=1, NotChecked=0, Total=2070 [2024-09-12 16:39:43,833 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 23 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 8 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2024-09-12 16:39:43,833 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 146 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 587 Invalid, 3 Unknown, 0 Unchecked, 13.8s Time] [2024-09-12 16:39:43,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-12 16:39:43,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2024-09-12 16:39:43,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-12 16:39:43,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2024-09-12 16:39:43,881 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2024-09-12 16:39:43,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:39:43,881 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2024-09-12 16:39:43,881 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 8 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-12 16:39:43,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:43,882 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2024-09-12 16:39:43,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-12 16:39:43,886 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:39:43,886 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:39:43,904 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-12 16:39:44,086 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-12 16:39:44,087 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:39:44,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:44,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1682971646, now seen corresponding path program 2 times [2024-09-12 16:39:44,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:39:44,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25325871] [2024-09-12 16:39:44,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:39:44,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:39:44,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:39:44,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1863071679] [2024-09-12 16:39:44,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 16:39:44,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:39:44,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:39:44,135 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:39:44,136 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 16:39:44,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 16:39:44,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:39:44,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 111 conjuncts are in the unsatisfiable core [2024-09-12 16:39:44,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:39:44,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-12 16:39:44,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-12 16:39:44,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-09-12 16:39:44,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 16:39:44,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2024-09-12 16:39:44,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2024-09-12 16:39:57,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2024-09-12 16:39:57,757 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 102 treesize of output 66 [2024-09-12 16:39:57,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 67 [2024-09-12 16:39:57,870 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 16:39:57,870 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 73 treesize of output 69 [2024-09-12 16:39:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 16:39:57,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:40:01,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:40:01,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25325871] [2024-09-12 16:40:01,154 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:40:01,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863071679] [2024-09-12 16:40:01,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863071679] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:40:01,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:40:01,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-12 16:40:01,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47977161] [2024-09-12 16:40:01,155 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 16:40:01,155 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-12 16:40:01,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:40:01,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-12 16:40:01,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=614, Unknown=1, NotChecked=0, Total=702 [2024-09-12 16:40:01,156 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 22 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 19 states have internal predecessors, (30), 9 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-12 16:40:05,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.50s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-12 16:40:10,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-12 16:40:12,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-12 16:40:17,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.57s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-12 16:40:21,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-12 16:40:25,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-12 16:40:29,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-12 16:40:30,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:40:30,059 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2024-09-12 16:40:30,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-12 16:40:30,060 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 19 states have internal predecessors, (30), 9 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Word has length 60 [2024-09-12 16:40:30,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:40:30,061 INFO L225 Difference]: With dead ends: 61 [2024-09-12 16:40:30,061 INFO L226 Difference]: Without dead ends: 55 [2024-09-12 16:40:30,062 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=157, Invalid=1174, Unknown=1, NotChecked=0, Total=1332 [2024-09-12 16:40:30,062 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 14 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.5s IncrementalHoareTripleChecker+Time [2024-09-12 16:40:30,063 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 119 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 484 Invalid, 5 Unknown, 0 Unchecked, 28.5s Time] [2024-09-12 16:40:30,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-12 16:40:30,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2024-09-12 16:40:30,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 10 states have call successors, (10), 9 states have call predecessors, (10), 9 states have return successors, (14), 9 states have call predecessors, (14), 8 states have call successors, (14) [2024-09-12 16:40:30,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2024-09-12 16:40:30,106 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 60 [2024-09-12 16:40:30,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:40:30,106 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2024-09-12 16:40:30,106 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 19 states have internal predecessors, (30), 9 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-12 16:40:30,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:40:30,110 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2024-09-12 16:40:30,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-12 16:40:30,111 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:40:30,111 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 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] [2024-09-12 16:40:30,119 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-12 16:40:30,312 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:40:30,312 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:40:30,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:40:30,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1610585088, now seen corresponding path program 1 times [2024-09-12 16:40:30,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:40:30,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306406064] [2024-09-12 16:40:30,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:40:30,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:40:30,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:40:31,618 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:40:31,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:40:31,624 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:40:31,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:40:31,627 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 16:40:31,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:40:31,648 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-12 16:40:31,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:40:32,275 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:40:32,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:40:32,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 16:40:32,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:40:32,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:40:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:40:32,695 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 16:40:32,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:40:32,916 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:40:32,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:40:32,929 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-12 16:40:32,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:40:32,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306406064] [2024-09-12 16:40:32,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306406064] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:40:32,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934537433] [2024-09-12 16:40:32,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:40:32,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:40:32,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:40:32,934 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:40:32,938 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-12 16:40:33,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:40:33,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 92 conjuncts are in the unsatisfiable core [2024-09-12 16:40:33,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:40:33,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-12 16:40:33,316 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 37 treesize of output 29 [2024-09-12 16:40:33,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-12 16:40:33,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-12 16:40:50,090 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 16:40:50,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:40:51,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934537433] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:40:51,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:40:51,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2024-09-12 16:40:51,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379107137] [2024-09-12 16:40:51,540 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:40:51,540 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-12 16:40:51,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:40:51,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-12 16:40:51,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=2421, Unknown=4, NotChecked=0, Total=2652 [2024-09-12 16:40:51,542 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 36 states, 27 states have (on average 2.074074074074074) internal successors, (56), 32 states have internal predecessors, (56), 15 states have call successors, (18), 6 states have call predecessors, (18), 9 states have return successors, (16), 12 states have call predecessors, (16), 14 states have call successors, (16) [2024-09-12 16:40:55,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-12 16:40:59,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-12 16:41:04,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-12 16:41:13,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-12 16:41:17,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-12 16:41:42,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:41:42,759 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2024-09-12 16:41:42,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-12 16:41:42,760 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 27 states have (on average 2.074074074074074) internal successors, (56), 32 states have internal predecessors, (56), 15 states have call successors, (18), 6 states have call predecessors, (18), 9 states have return successors, (16), 12 states have call predecessors, (16), 14 states have call successors, (16) Word has length 60 [2024-09-12 16:41:42,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:41:42,761 INFO L225 Difference]: With dead ends: 75 [2024-09-12 16:41:42,761 INFO L226 Difference]: Without dead ends: 69 [2024-09-12 16:41:42,762 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 47.6s TimeCoverageRelationStatistics Valid=542, Invalid=5147, Unknown=11, NotChecked=0, Total=5700 [2024-09-12 16:41:42,763 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 64 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 55 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.2s IncrementalHoareTripleChecker+Time [2024-09-12 16:41:42,763 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 191 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1074 Invalid, 5 Unknown, 0 Unchecked, 21.2s Time] [2024-09-12 16:41:42,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-12 16:41:42,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2024-09-12 16:41:42,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 37 states have internal predecessors, (38), 10 states have call successors, (10), 9 states have call predecessors, (10), 12 states have return successors, (22), 12 states have call predecessors, (22), 8 states have call successors, (22) [2024-09-12 16:41:42,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2024-09-12 16:41:42,830 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 60 [2024-09-12 16:41:42,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:41:42,831 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2024-09-12 16:41:42,831 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 27 states have (on average 2.074074074074074) internal successors, (56), 32 states have internal predecessors, (56), 15 states have call successors, (18), 6 states have call predecessors, (18), 9 states have return successors, (16), 12 states have call predecessors, (16), 14 states have call successors, (16) [2024-09-12 16:41:42,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:41:42,832 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2024-09-12 16:41:42,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-12 16:41:42,833 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:41:42,833 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 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] [2024-09-12 16:41:42,851 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-12 16:41:43,033 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:41:43,034 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:41:43,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:41:43,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1901826364, now seen corresponding path program 2 times [2024-09-12 16:41:43,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:41:43,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890976248] [2024-09-12 16:41:43,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:41:43,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:41:43,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:41:43,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592606146] [2024-09-12 16:41:43,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 16:41:43,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:41:43,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:41:43,074 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:41:43,077 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-12 16:41:43,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 16:41:43,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:41:43,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 133 conjuncts are in the unsatisfiable core [2024-09-12 16:41:43,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:41:43,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-12 16:41:43,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-12 16:41:43,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-09-12 16:41:43,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 16:41:43,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-09-12 16:41:43,514 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 40 [2024-09-12 16:41:52,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 41 [2024-09-12 16:41:52,891 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 110 treesize of output 74 [2024-09-12 16:41:52,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-12 16:41:53,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 74 [2024-09-12 16:41:53,077 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 16:41:53,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 111 [2024-09-12 16:41:54,386 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 29 refuted. 8 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-12 16:41:54,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:41:59,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:41:59,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890976248] [2024-09-12 16:41:59,005 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:41:59,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592606146] [2024-09-12 16:41:59,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592606146] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:41:59,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:41:59,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-12 16:41:59,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771584176] [2024-09-12 16:41:59,006 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 16:41:59,006 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-12 16:41:59,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:41:59,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-12 16:41:59,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=760, Unknown=2, NotChecked=0, Total=870 [2024-09-12 16:41:59,007 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 25 states, 20 states have (on average 1.85) internal successors, (37), 22 states have internal predecessors, (37), 10 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-12 16:42:03,040 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]