./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_ps5-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_ps5-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 02d2a7ecaeb1f9a3fd2c207ee063800bfd7475435ba7bc7e95648b1704092bfe --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 19:59:25,403 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 19:59:25,469 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 19:59:25,478 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 19:59:25,478 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 19:59:25,507 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 19:59:25,508 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 19:59:25,508 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 19:59:25,509 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 19:59:25,513 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 19:59:25,513 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 19:59:25,513 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 19:59:25,514 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 19:59:25,514 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 19:59:25,514 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 19:59:25,516 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 19:59:25,516 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 19:59:25,516 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 19:59:25,516 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 19:59:25,517 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 19:59:25,517 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 19:59:25,518 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 19:59:25,518 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 19:59:25,519 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 19:59:25,519 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 19:59:25,519 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 19:59:25,520 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 19:59:25,520 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 19:59:25,520 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 19:59:25,521 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 19:59:25,521 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 19:59:25,522 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 19:59:25,522 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:59:25,523 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 19:59:25,523 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 19:59:25,523 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 19:59:25,524 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 19:59:25,524 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 19:59:25,525 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 19:59:25,525 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 19:59:25,525 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 19:59:25,526 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 19:59:25,526 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02d2a7ecaeb1f9a3fd2c207ee063800bfd7475435ba7bc7e95648b1704092bfe Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-15 19:59:25,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 19:59:25,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 19:59:25,813 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 19:59:25,814 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 19:59:25,814 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 19:59:25,815 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_ps5-ll.c [2024-09-15 19:59:27,131 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 19:59:27,285 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 19:59:27,286 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_ps5-ll.c [2024-09-15 19:59:27,292 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/92ebbcbda/e845eaf0a972481ab94ad08242c746d7/FLAGcaeef4e00 [2024-09-15 19:59:27,695 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/92ebbcbda/e845eaf0a972481ab94ad08242c746d7 [2024-09-15 19:59:27,697 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 19:59:27,698 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-15 19:59:27,699 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 19:59:27,699 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 19:59:27,703 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 19:59:27,704 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:59:27" (1/1) ... [2024-09-15 19:59:27,706 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19bfec1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:59:27, skipping insertion in model container [2024-09-15 19:59:27,706 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:59:27" (1/1) ... [2024-09-15 19:59:27,723 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 19:59:27,847 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_ps5-ll.c[987,1000] [2024-09-15 19:59:27,869 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:59:27,883 INFO L200 MainTranslator]: Completed pre-run [2024-09-15 19:59:27,894 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_ps5-ll.c[987,1000] [2024-09-15 19:59:27,907 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:59:27,925 INFO L204 MainTranslator]: Completed translation [2024-09-15 19:59:27,926 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:59:27 WrapperNode [2024-09-15 19:59:27,926 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 19:59:27,927 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 19:59:27,927 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 19:59:27,928 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 19:59:27,933 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:59:27" (1/1) ... [2024-09-15 19:59:27,944 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:59:27" (1/1) ... [2024-09-15 19:59:27,952 INFO L138 Inliner]: procedures = 16, calls = 74, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-15 19:59:27,953 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 19:59:27,954 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 19:59:27,954 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 19:59:27,954 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 19:59:27,962 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:59:27" (1/1) ... [2024-09-15 19:59:27,962 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:59:27" (1/1) ... [2024-09-15 19:59:27,970 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:59:27" (1/1) ... [2024-09-15 19:59:27,988 INFO L175 MemorySlicer]: Split 51 memory accesses to 5 slices as follows [2, 4, 4, 36, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 7 writes are split as follows [0, 2, 1, 2, 2]. [2024-09-15 19:59:27,992 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:59:27" (1/1) ... [2024-09-15 19:59:27,992 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:59:27" (1/1) ... [2024-09-15 19:59:27,999 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:59:27" (1/1) ... [2024-09-15 19:59:28,005 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:59:27" (1/1) ... [2024-09-15 19:59:28,006 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:59:27" (1/1) ... [2024-09-15 19:59:28,007 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:59:27" (1/1) ... [2024-09-15 19:59:28,011 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 19:59:28,012 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 19:59:28,015 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 19:59:28,015 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 19:59:28,016 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:59:27" (1/1) ... [2024-09-15 19:59:28,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:59:28,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:59:28,046 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 19:59:28,048 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 19:59:28,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 19:59:28,086 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-15 19:59:28,086 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-15 19:59:28,086 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-15 19:59:28,086 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-15 19:59:28,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-15 19:59:28,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-15 19:59:28,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-15 19:59:28,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-15 19:59:28,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-15 19:59:28,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-15 19:59:28,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-15 19:59:28,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-15 19:59:28,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-15 19:59:28,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-15 19:59:28,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-15 19:59:28,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-15 19:59:28,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-15 19:59:28,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 19:59:28,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 19:59:28,090 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-15 19:59:28,090 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-15 19:59:28,090 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-15 19:59:28,091 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-15 19:59:28,091 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-15 19:59:28,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-15 19:59:28,091 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-15 19:59:28,091 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_27_to_35_0 [2024-09-15 19:59:28,091 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_27_to_35_0 [2024-09-15 19:59:28,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-15 19:59:28,179 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 19:59:28,181 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 19:59:28,380 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-09-15 19:59:28,380 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 19:59:28,404 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 19:59:28,404 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-15 19:59:28,404 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:59:28 BoogieIcfgContainer [2024-09-15 19:59:28,404 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 19:59:28,406 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 19:59:28,406 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 19:59:28,410 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 19:59:28,410 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 07:59:27" (1/3) ... [2024-09-15 19:59:28,413 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fa4bd72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:59:28, skipping insertion in model container [2024-09-15 19:59:28,413 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:59:27" (2/3) ... [2024-09-15 19:59:28,413 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fa4bd72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:59:28, skipping insertion in model container [2024-09-15 19:59:28,413 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:59:28" (3/3) ... [2024-09-15 19:59:28,414 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_ps5-ll.c [2024-09-15 19:59:28,426 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 19:59:28,426 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-15 19:59:28,479 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 19:59:28,484 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;@11248d90, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 19:59:28,484 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-15 19:59:28,487 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 19:59:28,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-15 19:59:28,492 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:59:28,493 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:59:28,493 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:59:28,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:59:28,497 INFO L85 PathProgramCache]: Analyzing trace with hash 460517386, now seen corresponding path program 1 times [2024-09-15 19:59:28,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:59:28,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853387259] [2024-09-15 19:59:28,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:59:28,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:59:28,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:59:28,652 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:59:28,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:59:28,658 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:59:28,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:59:28,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:59:28,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:59:28,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853387259] [2024-09-15 19:59:28,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853387259] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:59:28,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:59:28,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-15 19:59:28,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025108170] [2024-09-15 19:59:28,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:59:28,667 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-15 19:59:28,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:59:28,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-15 19:59:28,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-15 19:59:28,702 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 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-15 19:59:28,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:59:28,730 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2024-09-15 19:59:28,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-15 19:59:28,732 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2024-09-15 19:59:28,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:59:28,737 INFO L225 Difference]: With dead ends: 60 [2024-09-15 19:59:28,738 INFO L226 Difference]: Without dead ends: 30 [2024-09-15 19:59:28,741 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 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 19:59:28,743 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 19:59:28,745 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 19:59:28,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-15 19:59:28,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-09-15 19:59:28,767 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 19:59:28,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2024-09-15 19:59:28,769 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 18 [2024-09-15 19:59:28,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:59:28,769 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2024-09-15 19:59:28,769 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-15 19:59:28,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:59:28,770 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2024-09-15 19:59:28,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-15 19:59:28,770 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:59:28,770 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:59:28,771 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-15 19:59:28,771 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:59:28,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:59:28,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1161581964, now seen corresponding path program 1 times [2024-09-15 19:59:28,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:59:28,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744247558] [2024-09-15 19:59:28,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:59:28,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:59:28,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:59:28,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [567246684] [2024-09-15 19:59:28,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:59:28,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:59:28,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:59:28,823 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 19:59:28,827 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 19:59:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:59:28,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-15 19:59:28,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:59:29,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:59:29,072 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 19:59:29,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:59:29,194 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:59:29,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:59:29,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744247558] [2024-09-15 19:59:29,195 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:59:29,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567246684] [2024-09-15 19:59:29,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567246684] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:59:29,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:59:29,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-15 19:59:29,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435101386] [2024-09-15 19:59:29,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:59:29,198 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-15 19:59:29,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:59:29,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-15 19:59:29,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-15 19:59:29,199 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-15 19:59:29,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:59:29,349 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2024-09-15 19:59:29,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-15 19:59:29,350 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2024-09-15 19:59:29,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:59:29,351 INFO L225 Difference]: With dead ends: 44 [2024-09-15 19:59:29,351 INFO L226 Difference]: Without dead ends: 42 [2024-09-15 19:59:29,352 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-15 19:59:29,352 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:59:29,353 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 153 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:59:29,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-15 19:59:29,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2024-09-15 19:59:29,360 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 19:59:29,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2024-09-15 19:59:29,361 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 18 [2024-09-15 19:59:29,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:59:29,361 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2024-09-15 19:59:29,361 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-15 19:59:29,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:59:29,362 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2024-09-15 19:59:29,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-15 19:59:29,363 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:59:29,363 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] [2024-09-15 19:59:29,377 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 19:59:29,563 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 19:59:29,564 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:59:29,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:59:29,566 INFO L85 PathProgramCache]: Analyzing trace with hash -915195064, now seen corresponding path program 1 times [2024-09-15 19:59:29,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:59:29,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808594629] [2024-09-15 19:59:29,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:59:29,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:59:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:59:29,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402910927] [2024-09-15 19:59:29,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:59:29,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:59:29,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:59:29,706 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 19:59:29,710 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 19:59:29,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:59:29,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 88 conjuncts are in the unsatisfiable core [2024-09-15 19:59:29,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:59:29,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:59:29,876 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 19:59:30,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:59:30,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:59:30,248 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:59:30,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:59:30,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 19:59:30,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:59:30,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808594629] [2024-09-15 19:59:30,445 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:59:30,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402910927] [2024-09-15 19:59:30,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402910927] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:59:30,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:59:30,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 17 [2024-09-15 19:59:30,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115084955] [2024-09-15 19:59:30,446 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:59:30,446 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-15 19:59:30,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:59:30,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-15 19:59:30,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2024-09-15 19:59:30,448 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 17 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (11), 6 states have call predecessors, (11), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-15 19:59:30,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:59:30,916 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2024-09-15 19:59:30,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-15 19:59:30,916 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (11), 6 states have call predecessors, (11), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 28 [2024-09-15 19:59:30,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:59:30,919 INFO L225 Difference]: With dead ends: 71 [2024-09-15 19:59:30,919 INFO L226 Difference]: Without dead ends: 69 [2024-09-15 19:59:30,920 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2024-09-15 19:59:30,920 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 38 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:59:30,921 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 245 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 19:59:30,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-15 19:59:30,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 57. [2024-09-15 19:59:30,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 38 states have internal predecessors, (39), 11 states have call successors, (11), 9 states have call predecessors, (11), 10 states have return successors, (14), 10 states have call predecessors, (14), 9 states have call successors, (14) [2024-09-15 19:59:30,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2024-09-15 19:59:30,938 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 28 [2024-09-15 19:59:30,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:59:30,938 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2024-09-15 19:59:30,938 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (11), 6 states have call predecessors, (11), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-15 19:59:30,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:59:30,939 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2024-09-15 19:59:30,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-15 19:59:30,940 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:59:30,940 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:59:30,953 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 19:59:31,143 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 19:59:31,144 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:59:31,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:59:31,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1701306935, now seen corresponding path program 1 times [2024-09-15 19:59:31,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:59:31,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682540412] [2024-09-15 19:59:31,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:59:31,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:59:31,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:59:31,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1012354095] [2024-09-15 19:59:31,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:59:31,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:59:31,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:59:31,169 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 19:59:31,170 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 19:59:31,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:59:31,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-15 19:59:31,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:59:31,249 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 19:59:31,255 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 19:59:31,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:59:31,318 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:59:31,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:59:31,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682540412] [2024-09-15 19:59:31,319 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:59:31,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012354095] [2024-09-15 19:59:31,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012354095] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:59:31,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:59:31,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-15 19:59:31,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59510596] [2024-09-15 19:59:31,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:59:31,320 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-15 19:59:31,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:59:31,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-15 19:59:31,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-15 19:59:31,321 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-15 19:59:31,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:59:31,443 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2024-09-15 19:59:31,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-15 19:59:31,444 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2024-09-15 19:59:31,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:59:31,445 INFO L225 Difference]: With dead ends: 68 [2024-09-15 19:59:31,445 INFO L226 Difference]: Without dead ends: 66 [2024-09-15 19:59:31,445 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-15 19:59:31,446 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 13 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:59:31,446 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 67 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:59:31,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-15 19:59:31,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2024-09-15 19:59:31,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 40 states have (on average 1.1) internal successors, (44), 43 states have internal predecessors, (44), 12 states have call successors, (12), 10 states have call predecessors, (12), 12 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) [2024-09-15 19:59:31,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2024-09-15 19:59:31,472 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 28 [2024-09-15 19:59:31,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:59:31,473 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2024-09-15 19:59:31,473 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-15 19:59:31,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:59:31,474 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2024-09-15 19:59:31,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-15 19:59:31,477 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:59:31,478 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:59:31,492 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-15 19:59:31,678 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 19:59:31,679 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:59:31,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:59:31,680 INFO L85 PathProgramCache]: Analyzing trace with hash -2032764367, now seen corresponding path program 1 times [2024-09-15 19:59:31,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:59:31,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889694542] [2024-09-15 19:59:31,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:59:31,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:59:31,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:59:31,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [601954545] [2024-09-15 19:59:31,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:59:31,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:59:31,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:59:31,717 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 19:59:31,719 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 19:59:31,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:59:31,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-15 19:59:31,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:59:31,805 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 19:59:31,809 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 19:59:31,812 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 19:59:31,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-15 19:59:31,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:59:31,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:59:32,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:59:32,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889694542] [2024-09-15 19:59:32,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:59:32,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601954545] [2024-09-15 19:59:32,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601954545] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:59:32,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:59:32,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-09-15 19:59:32,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516042726] [2024-09-15 19:59:32,431 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:59:32,431 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-15 19:59:32,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:59:32,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-15 19:59:32,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-09-15 19:59:32,432 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 12 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-15 19:59:32,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:59:32,893 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2024-09-15 19:59:32,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-15 19:59:32,895 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 34 [2024-09-15 19:59:32,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:59:32,896 INFO L225 Difference]: With dead ends: 73 [2024-09-15 19:59:32,897 INFO L226 Difference]: Without dead ends: 57 [2024-09-15 19:59:32,897 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2024-09-15 19:59:32,898 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:59:32,898 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 60 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 283 Invalid, 1 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 19:59:32,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-15 19:59:32,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-09-15 19:59:32,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 37 states have internal predecessors, (38), 11 states have call successors, (11), 9 states have call predecessors, (11), 10 states have return successors, (14), 10 states have call predecessors, (14), 9 states have call successors, (14) [2024-09-15 19:59:32,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2024-09-15 19:59:32,911 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 34 [2024-09-15 19:59:32,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:59:32,912 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2024-09-15 19:59:32,912 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-15 19:59:32,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:59:32,912 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2024-09-15 19:59:32,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-15 19:59:32,913 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:59:32,913 INFO L216 NwaCegarLoop]: trace histogram [3, 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 19:59:32,926 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 19:59:33,117 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 19:59:33,118 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:59:33,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:59:33,118 INFO L85 PathProgramCache]: Analyzing trace with hash 937633571, now seen corresponding path program 1 times [2024-09-15 19:59:33,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:59:33,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403139930] [2024-09-15 19:59:33,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:59:33,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:59:33,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:59:33,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [780338466] [2024-09-15 19:59:33,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:59:33,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:59:33,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:59:33,185 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 19:59:33,194 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 19:59:33,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:59:33,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 112 conjuncts are in the unsatisfiable core [2024-09-15 19:59:33,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:59:33,479 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 19:59:33,485 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 19:59:34,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:59:34,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:59:34,426 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-15 19:59:34,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:59:39,801 WARN L293 SmtUtils]: Spent 5.12s on a formula simplification that was a NOOP. DAG size: 93 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-09-15 19:59:44,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:59:44,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403139930] [2024-09-15 19:59:44,510 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:59:44,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780338466] [2024-09-15 19:59:44,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780338466] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:59:44,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:59:44,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-15 19:59:44,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023441370] [2024-09-15 19:59:44,511 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:59:44,511 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-15 19:59:44,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:59:44,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-15 19:59:44,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2024-09-15 19:59:44,512 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 15 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-15 19:59:49,160 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 19:59:49,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:59:49,820 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2024-09-15 19:59:49,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-15 19:59:49,820 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 40 [2024-09-15 19:59:49,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:59:49,821 INFO L225 Difference]: With dead ends: 66 [2024-09-15 19:59:49,821 INFO L226 Difference]: Without dead ends: 64 [2024-09-15 19:59:49,822 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2024-09-15 19:59:49,822 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 18 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-09-15 19:59:49,822 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 102 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 362 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2024-09-15 19:59:49,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-09-15 19:59:49,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2024-09-15 19:59:49,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 41 states have internal predecessors, (42), 12 states have call successors, (12), 10 states have call predecessors, (12), 11 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) [2024-09-15 19:59:49,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2024-09-15 19:59:49,846 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 40 [2024-09-15 19:59:49,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:59:49,846 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2024-09-15 19:59:49,846 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-15 19:59:49,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:59:49,847 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2024-09-15 19:59:49,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-15 19:59:49,851 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:59:49,851 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:59:49,866 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-15 19:59:50,052 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-15 19:59:50,053 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:59:50,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:59:50,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1024286237, now seen corresponding path program 1 times [2024-09-15 19:59:50,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:59:50,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886904705] [2024-09-15 19:59:50,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:59:50,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:59:50,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:59:50,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [83372875] [2024-09-15 19:59:50,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:59:50,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:59:50,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:59:50,091 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:59:50,092 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-15 19:59:50,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:59:50,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-09-15 19:59:50,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:59:50,200 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 19:59:50,209 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 19:59:50,212 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 19:59:50,385 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 42 treesize of output 19 [2024-09-15 19:59:50,389 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 19:59:50,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:59:50,705 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-15 19:59:50,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:59:51,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2024-09-15 19:59:51,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 33 [2024-09-15 20:00:07,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:00:07,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886904705] [2024-09-15 20:00:07,859 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 20:00:07,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83372875] [2024-09-15 20:00:07,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83372875] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:00:07,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 20:00:07,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-15 20:00:07,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691601082] [2024-09-15 20:00:07,860 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 20:00:07,860 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-15 20:00:07,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:00:07,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-15 20:00:07,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=479, Unknown=2, NotChecked=0, Total=552 [2024-09-15 20:00:07,861 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand has 16 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-15 20:00:08,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:00:08,413 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2024-09-15 20:00:08,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-15 20:00:08,413 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 46 [2024-09-15 20:00:08,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:00:08,414 INFO L225 Difference]: With dead ends: 71 [2024-09-15 20:00:08,414 INFO L226 Difference]: Without dead ends: 53 [2024-09-15 20:00:08,415 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=118, Invalid=810, Unknown=2, NotChecked=0, Total=930 [2024-09-15 20:00:08,415 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 20:00:08,415 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 63 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 382 Invalid, 1 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 20:00:08,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-15 20:00:08,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-09-15 20:00:08,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-09-15 20:00:08,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2024-09-15 20:00:08,430 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 46 [2024-09-15 20:00:08,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:00:08,430 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2024-09-15 20:00:08,430 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-15 20:00:08,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:00:08,431 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2024-09-15 20:00:08,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-15 20:00:08,431 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:00:08,431 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:00:08,445 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-15 20:00:08,635 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:00:08,636 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 20:00:08,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:00:08,636 INFO L85 PathProgramCache]: Analyzing trace with hash 586229519, now seen corresponding path program 2 times [2024-09-15 20:00:08,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:00:08,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018847483] [2024-09-15 20:00:08,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:00:08,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:00:08,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 20:00:08,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [648576684] [2024-09-15 20:00:08,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 20:00:08,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:00:08,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:00:08,696 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 20:00:08,703 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-15 20:00:08,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 20:00:08,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 20:00:08,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 125 conjuncts are in the unsatisfiable core [2024-09-15 20:00:08,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:00:08,999 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 20:00:09,003 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 20:00:09,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 20:00:09,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 20:00:09,495 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-15 20:00:09,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:00:23,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2024-09-15 20:00:23,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-09-15 20:00:42,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:00:42,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018847483] [2024-09-15 20:00:42,675 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 20:00:42,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648576684] [2024-09-15 20:00:42,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648576684] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:00:42,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 20:00:42,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-15 20:00:42,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730025909] [2024-09-15 20:00:42,675 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 20:00:42,676 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-15 20:00:42,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:00:42,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-15 20:00:42,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=397, Unknown=5, NotChecked=0, Total=462 [2024-09-15 20:00:42,677 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand has 15 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-15 20:00:47,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:00:47,479 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2024-09-15 20:00:47,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-15 20:00:47,480 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 52 [2024-09-15 20:00:47,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:00:47,481 INFO L225 Difference]: With dead ends: 64 [2024-09-15 20:00:47,482 INFO L226 Difference]: Without dead ends: 62 [2024-09-15 20:00:47,482 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 32.4s TimeCoverageRelationStatistics Valid=85, Invalid=559, Unknown=6, NotChecked=0, Total=650 [2024-09-15 20:00:47,482 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 18 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-15 20:00:47,483 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 126 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-15 20:00:47,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-09-15 20:00:47,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2024-09-15 20:00:47,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 39 states have internal predecessors, (40), 12 states have call successors, (12), 10 states have call predecessors, (12), 10 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) [2024-09-15 20:00:47,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2024-09-15 20:00:47,506 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 52 [2024-09-15 20:00:47,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:00:47,506 INFO L474 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2024-09-15 20:00:47,506 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-15 20:00:47,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:00:47,506 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2024-09-15 20:00:47,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-15 20:00:47,507 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:00:47,507 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:00:47,521 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-15 20:00:47,711 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:00:47,712 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 20:00:47,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:00:47,712 INFO L85 PathProgramCache]: Analyzing trace with hash 680927739, now seen corresponding path program 3 times [2024-09-15 20:00:47,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:00:47,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039942329] [2024-09-15 20:00:47,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:00:47,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:00:47,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 20:00:47,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1117822875] [2024-09-15 20:00:47,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 20:00:47,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:00:47,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:00:47,782 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 20:00:47,783 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-15 20:00:48,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-15 20:00:48,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 20:00:48,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 160 conjuncts are in the unsatisfiable core [2024-09-15 20:00:48,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:00:48,287 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 20:00:48,443 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 20:00:48,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 20:00:48,951 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 22 proven. 22 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-09-15 20:00:48,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:00:54,188 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 635 treesize of output 631 [2024-09-15 20:00:58,491 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_int#3| c_func_to_recursive_line_27_to_35_0_~y.base))) (let ((.cse1 (select .cse2 c_func_to_recursive_line_27_to_35_0_~y.offset))) (or (and (let ((.cse0 (select (select (store |c_#memory_int#3| c_func_to_recursive_line_27_to_35_0_~y.base (store .cse2 c_func_to_recursive_line_27_to_35_0_~y.offset (+ .cse1 2))) |c_func_to_recursive_line_27_to_35_0_#in~y.base|) |c_func_to_recursive_line_27_to_35_0_#in~y.offset|))) (= (+ .cse0 (* (* .cse1 .cse1 .cse1 .cse1) 75) (* (* .cse1 .cse1 .cse1) 370) (* 1079 .cse1) 510 (* (* .cse1 .cse1 .cse1 .cse1 .cse1) 6) (* 900 (* .cse1 .cse1))) (+ (* (* .cse0 .cse0 .cse0 .cse0) 15) (* (* .cse0 .cse0 .cse0) 10) (* (* .cse0 .cse0 .cse0 .cse0 .cse0) 6)))) (= |c_func_to_recursive_line_27_to_35_0_#in~x.base| c_func_to_recursive_line_27_to_35_0_~x.base) (= c_func_to_recursive_line_27_to_35_0_~x.offset |c_func_to_recursive_line_27_to_35_0_#in~x.offset|)) (not (= (mod (+ .cse1 (* .cse1 .cse1 .cse1 .cse1 .cse1 24) (* .cse1 .cse1 .cse1 .cse1 15) (* .cse1 .cse1 .cse1 20)) 30) 0))))) is different from false [2024-09-15 20:01:10,384 WARN L293 SmtUtils]: Spent 11.85s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-15 20:01:18,977 WARN L293 SmtUtils]: Spent 8.59s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-15 20:02:52,413 WARN L293 SmtUtils]: Spent 12.04s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-15 20:03:00,470 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-15 20:03:04,795 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 709 treesize of output 705 [2024-09-15 20:03:09,826 WARN L293 SmtUtils]: Spent 5.00s on a formula simplification that was a NOOP. DAG size: 4 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-15 20:03:26,918 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 709 treesize of output 705 [2024-09-15 20:03:34,927 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 4 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-15 20:03:43,061 WARN L293 SmtUtils]: Spent 8.13s on a formula simplification that was a NOOP. DAG size: 4 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-15 20:03:59,075 WARN L293 SmtUtils]: Spent 16.01s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-15 20:04:11,097 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse11 (select |c_#memory_int#3| c_func_to_recursive_line_27_to_35_0_~y.base))) (let ((.cse9 (select .cse11 c_func_to_recursive_line_27_to_35_0_~y.offset))) (or (let ((.cse13 (select |c_old(#memory_int#3)| |c_func_to_recursive_line_27_to_35_0_#in~y.base|))) (let ((.cse0 (select .cse13 |c_func_to_recursive_line_27_to_35_0_#in~y.offset|))) (let ((.cse2 (* 900 (* .cse0 .cse0))) (.cse3 (* (* .cse0 .cse0 .cse0 .cse0) 75)) (.cse5 (* (* .cse0 .cse0 .cse0 .cse0 .cse0) 6)) (.cse6 (* .cse0 1079)) (.cse7 (* 370 (* .cse0 .cse0 .cse0))) (.cse8 (store |c_old(#memory_int#3)| |c_func_to_recursive_line_27_to_35_0_#in~y.base| (store .cse13 |c_func_to_recursive_line_27_to_35_0_#in~y.offset| (+ .cse0 2))))) (let ((.cse1 (forall ((|v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_19| Int) (|v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_19| Int)) (not (let ((.cse12 (select (select .cse8 |v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_19|) |v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_19|))) (= (+ .cse2 .cse3 .cse12 510 .cse5 .cse6 .cse7) (+ (* (* .cse12 .cse12 .cse12 .cse12 .cse12) 6) (* (* .cse12 .cse12 .cse12) 10) (* 15 (* .cse12 .cse12 .cse12 .cse12))))))))) (and (= (mod (+ (* .cse0 .cse0 .cse0 .cse0 .cse0 24) .cse0 (* .cse0 .cse0 .cse0 20) (* .cse0 .cse0 .cse0 .cse0 15)) 30) 0) (or (= |c_func_to_recursive_line_27_to_35_0_#in~x.base| c_func_to_recursive_line_27_to_35_0_~x.base) .cse1) (or (= c_func_to_recursive_line_27_to_35_0_~x.offset |c_func_to_recursive_line_27_to_35_0_#in~x.offset|) .cse1) (forall ((|v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_19| Int) (|v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_19| Int)) (or (not (let ((.cse4 (select (select .cse8 |v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_19|) |v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_19|))) (= (+ .cse2 .cse3 .cse4 510 .cse5 .cse6 .cse7) (+ (* (* .cse4 .cse4 .cse4 .cse4 .cse4) 6) (* (* .cse4 .cse4 .cse4) 10) (* 15 (* .cse4 .cse4 .cse4 .cse4)))))) (let ((.cse10 (select (select (store |c_#memory_int#3| c_func_to_recursive_line_27_to_35_0_~y.base (store .cse11 c_func_to_recursive_line_27_to_35_0_~y.offset (+ .cse9 1))) |v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_19|) |v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_19|))) (= (+ (* 119 .cse9) (* (* .cse9 .cse9 .cse9 .cse9) 45) 30 (* 180 (* .cse9 .cse9)) (* (* .cse9 .cse9 .cse9) 130) (* (* .cse9 .cse9 .cse9 .cse9 .cse9) 6) .cse10) (+ (* 6 (* .cse10 .cse10 .cse10 .cse10 .cse10)) (* (* .cse10 .cse10 .cse10 .cse10) 15) (* (* .cse10 .cse10 .cse10) 10))))))))))) (not (= (mod (+ (* .cse9 .cse9 .cse9 .cse9 15) (* .cse9 29) (* .cse9 .cse9 .cse9 .cse9 .cse9 6) (* .cse9 .cse9 .cse9 10)) 30) 0))))) is different from false [2024-09-15 20:04:11,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:04:11,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039942329] [2024-09-15 20:04:11,315 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 20:04:11,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117822875] [2024-09-15 20:04:11,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117822875] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:04:11,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 20:04:11,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-15 20:04:11,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804049848] [2024-09-15 20:04:11,316 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 20:04:11,316 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-15 20:04:11,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:04:11,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-15 20:04:11,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=623, Unknown=12, NotChecked=102, Total=812 [2024-09-15 20:04:11,317 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 7 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8)