./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_geo1-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 04d6fb36 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_geo1-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 4db0bca5538daf39b8ff60992164692d97581cce14eb7bcb8400899fae1cb0e3 --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-tmp.dk.referee-eval-04d6fb3-m [2024-09-15 19:55:17,663 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 19:55:17,742 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 19:55:17,746 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 19:55:17,747 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 19:55:17,778 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 19:55:17,778 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 19:55:17,779 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 19:55:17,779 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 19:55:17,780 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 19:55:17,783 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 19:55:17,784 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 19:55:17,784 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 19:55:17,785 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 19:55:17,785 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 19:55:17,785 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 19:55:17,785 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 19:55:17,786 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 19:55:17,786 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 19:55:17,786 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 19:55:17,786 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 19:55:17,789 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 19:55:17,789 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 19:55:17,789 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 19:55:17,789 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 19:55:17,790 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 19:55:17,790 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 19:55:17,790 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 19:55:17,791 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 19:55:17,791 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 19:55:17,791 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 19:55:17,792 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 19:55:17,792 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:55:17,792 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 19:55:17,792 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 19:55:17,793 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 19:55:17,793 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 19:55:17,793 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 19:55:17,794 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 19:55:17,794 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 19:55:17,794 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 19:55:17,795 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 19:55:17,795 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4db0bca5538daf39b8ff60992164692d97581cce14eb7bcb8400899fae1cb0e3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-15 19:55:18,081 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 19:55:18,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 19:55:18,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 19:55:18,105 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 19:55:18,106 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 19:55:18,107 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_geo1-ll.c [2024-09-15 19:55:19,626 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 19:55:19,805 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 19:55:19,806 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_geo1-ll.c [2024-09-15 19:55:19,813 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/5788996a8/59265c9759334deca157f18eda19489a/FLAG7c508c344 [2024-09-15 19:55:19,824 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/5788996a8/59265c9759334deca157f18eda19489a [2024-09-15 19:55:19,827 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 19:55:19,829 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-15 19:55:19,830 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 19:55:19,832 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 19:55:19,837 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 19:55:19,838 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:55:19" (1/1) ... [2024-09-15 19:55:19,839 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39c37ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:55:19, skipping insertion in model container [2024-09-15 19:55:19,839 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:55:19" (1/1) ... [2024-09-15 19:55:19,855 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 19:55:19,999 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_geo1-ll.c[1076,1089] [2024-09-15 19:55:20,018 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:55:20,035 INFO L200 MainTranslator]: Completed pre-run [2024-09-15 19:55:20,047 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_geo1-ll.c[1076,1089] [2024-09-15 19:55:20,060 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:55:20,083 INFO L204 MainTranslator]: Completed translation [2024-09-15 19:55:20,084 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:55:20 WrapperNode [2024-09-15 19:55:20,085 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 19:55:20,086 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 19:55:20,086 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 19:55:20,086 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 19:55:20,092 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:55:20" (1/1) ... [2024-09-15 19:55:20,103 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:55:20" (1/1) ... [2024-09-15 19:55:20,114 INFO L138 Inliner]: procedures = 16, calls = 55, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-15 19:55:20,114 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 19:55:20,115 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 19:55:20,115 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 19:55:20,115 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 19:55:20,126 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:55:20" (1/1) ... [2024-09-15 19:55:20,127 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:55:20" (1/1) ... [2024-09-15 19:55:20,130 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:55:20" (1/1) ... [2024-09-15 19:55:20,151 INFO L175 MemorySlicer]: Split 29 memory accesses to 6 slices as follows [2, 4, 8, 5, 7, 3]. 28 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 9 writes are split as follows [0, 2, 3, 2, 1, 1]. [2024-09-15 19:55:20,152 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:55:20" (1/1) ... [2024-09-15 19:55:20,152 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:55:20" (1/1) ... [2024-09-15 19:55:20,160 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:55:20" (1/1) ... [2024-09-15 19:55:20,163 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:55:20" (1/1) ... [2024-09-15 19:55:20,167 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:55:20" (1/1) ... [2024-09-15 19:55:20,171 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:55:20" (1/1) ... [2024-09-15 19:55:20,173 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 19:55:20,175 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 19:55:20,175 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 19:55:20,175 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 19:55:20,176 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:55:20" (1/1) ... [2024-09-15 19:55:20,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:55:20,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:55:20,211 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) [2024-09-15 19:55:20,217 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 [2024-09-15 19:55:20,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 19:55:20,259 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-15 19:55:20,260 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-15 19:55:20,260 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-15 19:55:20,260 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-15 19:55:20,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-15 19:55:20,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-15 19:55:20,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-15 19:55:20,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-15 19:55:20,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-15 19:55:20,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-15 19:55:20,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-15 19:55:20,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-15 19:55:20,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-15 19:55:20,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-15 19:55:20,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-15 19:55:20,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-15 19:55:20,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-15 19:55:20,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-15 19:55:20,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-15 19:55:20,262 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_30_to_38_0 [2024-09-15 19:55:20,262 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_30_to_38_0 [2024-09-15 19:55:20,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 19:55:20,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 19:55:20,262 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-15 19:55:20,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-15 19:55:20,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-15 19:55:20,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-15 19:55:20,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-15 19:55:20,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-15 19:55:20,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-15 19:55:20,263 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-15 19:55:20,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-15 19:55:20,379 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 19:55:20,381 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 19:55:20,628 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-09-15 19:55:20,629 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 19:55:20,654 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 19:55:20,654 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-15 19:55:20,654 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:55:20 BoogieIcfgContainer [2024-09-15 19:55:20,655 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 19:55:20,656 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 19:55:20,656 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 19:55:20,660 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 19:55:20,660 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 07:55:19" (1/3) ... [2024-09-15 19:55:20,661 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@305854e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:55:20, skipping insertion in model container [2024-09-15 19:55:20,662 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:55:20" (2/3) ... [2024-09-15 19:55:20,663 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@305854e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:55:20, skipping insertion in model container [2024-09-15 19:55:20,663 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:55:20" (3/3) ... [2024-09-15 19:55:20,664 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_geo1-ll.c [2024-09-15 19:55:20,679 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 19:55:20,679 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-15 19:55:20,733 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 19:55:20,743 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;@701c08a7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 19:55:20,744 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-15 19:55:20,748 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 19 states have (on average 1.263157894736842) internal successors, (24), 21 states have internal predecessors, (24), 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) [2024-09-15 19:55:20,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-15 19:55:20,756 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:55:20,756 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] [2024-09-15 19:55:20,757 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:55:20,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:55:20,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1018411894, now seen corresponding path program 1 times [2024-09-15 19:55:20,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:55:20,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403253528] [2024-09-15 19:55:20,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:55:20,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:55:20,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:55:20,983 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:55:20,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:55:20,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:55:20,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:55:21,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:55:21,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:55:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:55:21,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:55:21,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403253528] [2024-09-15 19:55:21,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403253528] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:55:21,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:55:21,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-15 19:55:21,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902030594] [2024-09-15 19:55:21,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:55:21,032 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-15 19:55:21,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:55:21,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-15 19:55:21,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-15 19:55:21,052 INFO L87 Difference]: Start difference. First operand has 34 states, 19 states have (on average 1.263157894736842) internal successors, (24), 21 states have internal predecessors, (24), 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) [2024-09-15 19:55:21,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:55:21,079 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2024-09-15 19:55:21,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-15 19:55:21,081 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 [2024-09-15 19:55:21,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:55:21,086 INFO L225 Difference]: With dead ends: 62 [2024-09-15 19:55:21,086 INFO L226 Difference]: Without dead ends: 30 [2024-09-15 19:55:21,089 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 [2024-09-15 19:55:21,092 INFO L434 NwaCegarLoop]: 35 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, 35 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 [2024-09-15 19:55:21,093 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:55:21,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-15 19:55:21,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-09-15 19:55:21,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 19 states have internal predecessors, (19), 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) [2024-09-15 19:55:21,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2024-09-15 19:55:21,132 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 24 [2024-09-15 19:55:21,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:55:21,133 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2024-09-15 19:55:21,133 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) [2024-09-15 19:55:21,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:55:21,134 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2024-09-15 19:55:21,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-15 19:55:21,136 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:55:21,136 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] [2024-09-15 19:55:21,136 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-15 19:55:21,136 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:55:21,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:55:21,137 INFO L85 PathProgramCache]: Analyzing trace with hash 131128570, now seen corresponding path program 1 times [2024-09-15 19:55:21,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:55:21,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292173410] [2024-09-15 19:55:21,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:55:21,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:55:21,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:55:21,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [256649430] [2024-09-15 19:55:21,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:55:21,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:55:21,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:55:21,221 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) [2024-09-15 19:55:21,223 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-15 19:55:21,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:55:21,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-15 19:55:21,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:55:21,477 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 [2024-09-15 19:55:21,600 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 [2024-09-15 19:55:21,608 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 [2024-09-15 19:55:21,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-09-15 19:55:21,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-09-15 19:55:21,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:55:21,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:55:22,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:55:22,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:55:22,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292173410] [2024-09-15 19:55:22,139 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:55:22,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256649430] [2024-09-15 19:55:22,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256649430] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-15 19:55:22,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:55:22,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 17 [2024-09-15 19:55:22,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189718343] [2024-09-15 19:55:22,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:55:22,141 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-15 19:55:22,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:55:22,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-15 19:55:22,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2024-09-15 19:55:22,143 INFO L87 Difference]: Start difference. First operand 30 states and 33 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) [2024-09-15 19:55:26,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-15 19:55:26,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:55:26,678 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2024-09-15 19:55:26,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-15 19:55:26,679 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 [2024-09-15 19:55:26,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:55:26,680 INFO L225 Difference]: With dead ends: 44 [2024-09-15 19:55:26,680 INFO L226 Difference]: Without dead ends: 42 [2024-09-15 19:55:26,681 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2024-09-15 19:55:26,682 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:55:26,682 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 155 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2024-09-15 19:55:26,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-15 19:55:26,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2024-09-15 19:55:26,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.12) internal successors, (28), 27 states have internal predecessors, (28), 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) [2024-09-15 19:55:26,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2024-09-15 19:55:26,698 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 24 [2024-09-15 19:55:26,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:55:26,699 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2024-09-15 19:55:26,699 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) [2024-09-15 19:55:26,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:55:26,700 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2024-09-15 19:55:26,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-15 19:55:26,701 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:55:26,701 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] [2024-09-15 19:55:26,720 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-15 19:55:26,902 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 [2024-09-15 19:55:26,902 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:55:26,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:55:26,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1880612969, now seen corresponding path program 1 times [2024-09-15 19:55:26,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:55:26,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213691045] [2024-09-15 19:55:26,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:55:26,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:55:27,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:55:27,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1158431281] [2024-09-15 19:55:27,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:55:27,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:55:27,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:55:27,023 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) [2024-09-15 19:55:27,024 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-15 19:55:27,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:55:27,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-09-15 19:55:27,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:55:27,171 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 [2024-09-15 19:55:27,261 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 [2024-09-15 19:55:27,269 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 [2024-09-15 19:55:27,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2024-09-15 19:55:27,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-09-15 19:55:27,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2024-09-15 19:55:27,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2024-09-15 19:55:27,704 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 54 treesize of output 26 [2024-09-15 19:55:27,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:55:27,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:55:37,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 2 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:55:37,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:55:37,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213691045] [2024-09-15 19:55:37,020 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:55:37,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158431281] [2024-09-15 19:55:37,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158431281] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:55:37,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:55:37,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 26 [2024-09-15 19:55:37,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951816573] [2024-09-15 19:55:37,021 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:55:37,022 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-15 19:55:37,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:55:37,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-15 19:55:37,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=571, Unknown=2, NotChecked=0, Total=650 [2024-09-15 19:55:37,024 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 26 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 19 states have internal predecessors, (39), 11 states have call successors, (14), 9 states have call predecessors, (14), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-15 19:55:41,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:56:00,519 WARN L293 SmtUtils]: Spent 8.43s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-15 19:56:12,492 WARN L293 SmtUtils]: Spent 11.31s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-15 19:56:16,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-15 19:56:28,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-15 19:56:40,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-15 19:56:44,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-15 19:57:09,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-15 19:57:13,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-15 19:57:41,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-15 19:57:45,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-15 19:57:49,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-15 19:57:53,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-15 19:57:57,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-15 19:58:01,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-15 19:58:05,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-15 19:58:09,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-15 19:58:13,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-15 19:58:17,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-15 19:58:21,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-15 19:58:25,497 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] [2024-09-15 19:58:25,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:58:25,572 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2024-09-15 19:58:25,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-15 19:58:25,573 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 19 states have internal predecessors, (39), 11 states have call successors, (14), 9 states have call predecessors, (14), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) Word has length 34 [2024-09-15 19:58:25,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:58:25,577 INFO L225 Difference]: With dead ends: 82 [2024-09-15 19:58:25,579 INFO L226 Difference]: Without dead ends: 80 [2024-09-15 19:58:25,580 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 99.8s TimeCoverageRelationStatistics Valid=266, Invalid=1697, Unknown=17, NotChecked=0, Total=1980 [2024-09-15 19:58:25,582 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 112 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 43 mSolverCounterUnsat, 19 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 77.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 19 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 77.9s IncrementalHoareTripleChecker+Time [2024-09-15 19:58:25,583 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 355 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 439 Invalid, 19 Unknown, 0 Unchecked, 77.9s Time] [2024-09-15 19:58:25,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-09-15 19:58:25,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2024-09-15 19:58:25,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 48 states have (on average 1.125) internal successors, (54), 53 states have internal predecessors, (54), 15 states have call successors, (15), 12 states have call predecessors, (15), 13 states have return successors, (19), 13 states have call predecessors, (19), 13 states have call successors, (19) [2024-09-15 19:58:25,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2024-09-15 19:58:25,631 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 34 [2024-09-15 19:58:25,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:58:25,632 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2024-09-15 19:58:25,632 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 19 states have internal predecessors, (39), 11 states have call successors, (14), 9 states have call predecessors, (14), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-15 19:58:25,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:58:25,634 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2024-09-15 19:58:25,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-15 19:58:25,636 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:58:25,636 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] [2024-09-15 19:58:25,653 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-15 19:58:25,837 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 [2024-09-15 19:58:25,837 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:58:25,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:58:25,838 INFO L85 PathProgramCache]: Analyzing trace with hash 382678784, now seen corresponding path program 1 times [2024-09-15 19:58:25,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:58:25,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012764021] [2024-09-15 19:58:25,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:58:25,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:58:25,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:58:25,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1110051195] [2024-09-15 19:58:25,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:58:25,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:58:25,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:58:25,933 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) [2024-09-15 19:58:25,934 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-15 19:58:26,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:58:26,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-15 19:58:26,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:58:26,034 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 [2024-09-15 19:58:26,040 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 [2024-09-15 19:58:26,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:58:26,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-15 19:58:26,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-15 19:58:26,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:58:26,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:58:26,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:58:26,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012764021] [2024-09-15 19:58:26,780 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:58:26,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110051195] [2024-09-15 19:58:26,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110051195] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:58:26,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:58:26,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-09-15 19:58:26,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771035548] [2024-09-15 19:58:26,781 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:58:26,781 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-15 19:58:26,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:58:26,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-15 19:58:26,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-09-15 19:58:26,782 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-15 19:58:27,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:58:27,004 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2024-09-15 19:58:27,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-15 19:58:27,005 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 34 [2024-09-15 19:58:27,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:58:27,006 INFO L225 Difference]: With dead ends: 89 [2024-09-15 19:58:27,006 INFO L226 Difference]: Without dead ends: 79 [2024-09-15 19:58:27,007 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-09-15 19:58:27,007 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:58:27,008 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 95 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:58:27,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-09-15 19:58:27,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2024-09-15 19:58:27,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 53 states have internal predecessors, (54), 15 states have call successors, (15), 12 states have call predecessors, (15), 14 states have return successors, (20), 13 states have call predecessors, (20), 13 states have call successors, (20) [2024-09-15 19:58:27,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2024-09-15 19:58:27,051 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 34 [2024-09-15 19:58:27,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:58:27,052 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2024-09-15 19:58:27,052 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-15 19:58:27,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:58:27,052 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2024-09-15 19:58:27,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-15 19:58:27,054 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:58:27,054 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] [2024-09-15 19:58:27,076 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-15 19:58:27,254 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 [2024-09-15 19:58:27,255 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:58:27,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:58:27,255 INFO L85 PathProgramCache]: Analyzing trace with hash -24388843, now seen corresponding path program 1 times [2024-09-15 19:58:27,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:58:27,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306696735] [2024-09-15 19:58:27,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:58:27,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:58:27,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:58:27,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1518110162] [2024-09-15 19:58:27,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:58:27,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:58:27,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:58:27,348 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) [2024-09-15 19:58:27,350 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-15 19:58:27,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:58:27,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-09-15 19:58:27,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:58:27,496 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 [2024-09-15 19:58:27,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:58:27,557 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 [2024-09-15 19:58:27,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:58:28,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-09-15 19:58:28,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2024-09-15 19:58:28,088 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 33 treesize of output 21 [2024-09-15 19:58:28,103 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:58:28,104 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 47 treesize of output 35 [2024-09-15 19:58:28,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-15 19:58:28,180 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 19:58:28,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:58:35,836 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 43 [2024-09-15 19:58:35,845 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 39 [2024-09-15 19:58:38,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:58:38,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306696735] [2024-09-15 19:58:38,852 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:58:38,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518110162] [2024-09-15 19:58:38,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518110162] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:58:38,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:58:38,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-15 19:58:38,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634905240] [2024-09-15 19:58:38,852 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:58:38,853 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-15 19:58:38,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:58:38,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-15 19:58:38,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=484, Unknown=1, NotChecked=0, Total=552 [2024-09-15 19:58:38,854 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand has 17 states, 14 states have (on average 2.142857142857143) internal successors, (30), 15 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) [2024-09-15 19:58:42,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:58:43,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:58:43,827 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2024-09-15 19:58:43,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-15 19:58:43,828 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.142857142857143) internal successors, (30), 15 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 46 [2024-09-15 19:58:43,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:58:43,829 INFO L225 Difference]: With dead ends: 89 [2024-09-15 19:58:43,829 INFO L226 Difference]: Without dead ends: 77 [2024-09-15 19:58:43,830 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=125, Invalid=866, Unknown=1, NotChecked=0, Total=992 [2024-09-15 19:58:43,830 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 19 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-09-15 19:58:43,831 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 161 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 371 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2024-09-15 19:58:43,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-15 19:58:43,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-09-15 19:58:43,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 51 states have internal predecessors, (52), 15 states have call successors, (15), 12 states have call predecessors, (15), 13 states have return successors, (20), 13 states have call predecessors, (20), 13 states have call successors, (20) [2024-09-15 19:58:43,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2024-09-15 19:58:43,864 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 46 [2024-09-15 19:58:43,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:58:43,864 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2024-09-15 19:58:43,865 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.142857142857143) internal successors, (30), 15 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) [2024-09-15 19:58:43,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:58:43,865 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2024-09-15 19:58:43,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-15 19:58:43,867 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:58:43,867 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] [2024-09-15 19:58:43,880 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-15 19:58:44,067 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 [2024-09-15 19:58:44,068 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:58:44,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:58:44,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1696915306, now seen corresponding path program 2 times [2024-09-15 19:58:44,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:58:44,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465075825] [2024-09-15 19:58:44,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:58:44,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:58:44,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:58:44,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [819020193] [2024-09-15 19:58:44,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 19:58:44,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:58:44,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:58:44,200 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) [2024-09-15 19:58:44,201 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-15 19:58:44,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 19:58:44,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:58:44,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 191 conjuncts are in the unsatisfiable core [2024-09-15 19:58:44,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:58:44,497 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 [2024-09-15 19:58:44,500 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 [2024-09-15 19:58:44,605 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 [2024-09-15 19:58:45,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-09-15 19:58:45,413 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 [2024-09-15 19:58:45,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-09-15 19:58:47,176 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 [2024-09-15 19:58:47,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2024-09-15 19:58:47,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-09-15 19:59:28,546 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-15 19:59:28,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:59:41,851 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 70 [2024-09-15 19:59:41,873 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:59:41,873 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 125 treesize of output 104 [2024-09-15 19:59:46,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:59:46,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465075825] [2024-09-15 19:59:46,566 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:59:46,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819020193] [2024-09-15 19:59:46,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819020193] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:59:46,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:59:46,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2024-09-15 19:59:46,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648046217] [2024-09-15 19:59:46,566 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:59:46,567 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-15 19:59:46,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:59:46,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-15 19:59:46,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=794, Unknown=11, NotChecked=0, Total=930 [2024-09-15 19:59:46,568 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand has 28 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 states have internal predecessors, (31), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-15 19:59:50,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]