./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-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_cohendiv-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 7c6261a52ba91bad3864c182e4633afd262bc5fe07cf18f92cb66db83623b9ae --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 19:52:58,005 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 19:52:58,065 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 19:52:58,071 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 19:52:58,071 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 19:52:58,094 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 19:52:58,096 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 19:52:58,097 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 19:52:58,097 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 19:52:58,100 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 19:52:58,100 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 19:52:58,100 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 19:52:58,101 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 19:52:58,101 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 19:52:58,101 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 19:52:58,101 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 19:52:58,102 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 19:52:58,102 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 19:52:58,102 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 19:52:58,102 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 19:52:58,103 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 19:52:58,104 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 19:52:58,104 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 19:52:58,104 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 19:52:58,104 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 19:52:58,105 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 19:52:58,105 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 19:52:58,105 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 19:52:58,105 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 19:52:58,105 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 19:52:58,107 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 19:52:58,107 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 19:52:58,107 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:52:58,107 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 19:52:58,108 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 19:52:58,108 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 19:52:58,108 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 19:52:58,108 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 19:52:58,108 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 19:52:58,108 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 19:52:58,108 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 19:52:58,109 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 19:52:58,110 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c6261a52ba91bad3864c182e4633afd262bc5fe07cf18f92cb66db83623b9ae Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-15 19:52:58,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 19:52:58,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 19:52:58,375 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 19:52:58,375 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 19:52:58,376 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 19:52:58,377 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c [2024-09-15 19:52:59,628 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 19:52:59,788 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 19:52:59,789 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c [2024-09-15 19:52:59,799 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/0f296b9ea/88b003df79f0442280db693b8b9565ba/FLAG8ec7fc660 [2024-09-15 19:53:00,183 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/0f296b9ea/88b003df79f0442280db693b8b9565ba [2024-09-15 19:53:00,186 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 19:53:00,187 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-15 19:53:00,189 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 19:53:00,190 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 19:53:00,194 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 19:53:00,194 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:53:00" (1/1) ... [2024-09-15 19:53:00,195 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42876b7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:00, skipping insertion in model container [2024-09-15 19:53:00,195 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:53:00" (1/1) ... [2024-09-15 19:53:00,211 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 19:53:00,332 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_cohendiv-ll.c[1136,1149] [2024-09-15 19:53:00,352 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:53:00,361 INFO L200 MainTranslator]: Completed pre-run [2024-09-15 19:53:00,371 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_cohendiv-ll.c[1136,1149] [2024-09-15 19:53:00,387 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:53:00,402 INFO L204 MainTranslator]: Completed translation [2024-09-15 19:53:00,402 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:00 WrapperNode [2024-09-15 19:53:00,403 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 19:53:00,404 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 19:53:00,404 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 19:53:00,404 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 19:53:00,411 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:00" (1/1) ... [2024-09-15 19:53:00,419 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:00" (1/1) ... [2024-09-15 19:53:00,426 INFO L138 Inliner]: procedures = 17, calls = 84, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-15 19:53:00,427 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 19:53:00,427 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 19:53:00,427 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 19:53:00,428 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 19:53:00,439 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:00" (1/1) ... [2024-09-15 19:53:00,439 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:00" (1/1) ... [2024-09-15 19:53:00,446 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:00" (1/1) ... [2024-09-15 19:53:00,475 INFO L175 MemorySlicer]: Split 49 memory accesses to 7 slices as follows [2, 5, 10, 10, 8, 8, 6]. 20 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0]. The 12 writes are split as follows [0, 1, 1, 2, 3, 3, 2]. [2024-09-15 19:53:00,475 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:00" (1/1) ... [2024-09-15 19:53:00,476 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:00" (1/1) ... [2024-09-15 19:53:00,487 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:00" (1/1) ... [2024-09-15 19:53:00,488 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:00" (1/1) ... [2024-09-15 19:53:00,489 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:00" (1/1) ... [2024-09-15 19:53:00,490 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:00" (1/1) ... [2024-09-15 19:53:00,493 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 19:53:00,493 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 19:53:00,493 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 19:53:00,494 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 19:53:00,494 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:00" (1/1) ... [2024-09-15 19:53:00,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:53:00,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:53:00,530 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 19:53:00,533 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 19:53:00,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 19:53:00,576 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-15 19:53:00,576 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-15 19:53:00,576 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-15 19:53:00,576 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-15 19:53:00,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-15 19:53:00,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-15 19:53:00,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-15 19:53:00,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-15 19:53:00,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-15 19:53:00,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-15 19:53:00,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-15 19:53:00,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-15 19:53:00,578 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_41_to_52_0 [2024-09-15 19:53:00,579 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_41_to_52_0 [2024-09-15 19:53:00,579 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_32_to_55_0 [2024-09-15 19:53:00,579 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_32_to_55_0 [2024-09-15 19:53:00,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-15 19:53:00,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-15 19:53:00,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-15 19:53:00,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-15 19:53:00,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-15 19:53:00,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-15 19:53:00,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-15 19:53:00,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-15 19:53:00,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-15 19:53:00,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 19:53:00,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 19:53:00,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-15 19:53:00,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-15 19:53:00,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-15 19:53:00,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-15 19:53:00,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-15 19:53:00,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-15 19:53:00,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-15 19:53:00,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-15 19:53:00,581 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-15 19:53:00,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-15 19:53:00,689 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 19:53:00,690 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 19:53:00,913 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-15 19:53:00,913 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 19:53:00,934 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 19:53:00,935 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-15 19:53:00,935 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:53:00 BoogieIcfgContainer [2024-09-15 19:53:00,936 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 19:53:00,937 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 19:53:00,937 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 19:53:00,940 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 19:53:00,940 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 07:53:00" (1/3) ... [2024-09-15 19:53:00,941 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752f5fd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:53:00, skipping insertion in model container [2024-09-15 19:53:00,941 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:00" (2/3) ... [2024-09-15 19:53:00,941 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752f5fd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:53:00, skipping insertion in model container [2024-09-15 19:53:00,942 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:53:00" (3/3) ... [2024-09-15 19:53:00,943 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_cohendiv-ll.c [2024-09-15 19:53:00,958 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 19:53:00,958 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-15 19:53:01,035 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 19:53:01,041 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;@74b33315, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 19:53:01,042 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-15 19:53:01,046 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 28 states have (on average 1.25) internal successors, (35), 31 states have internal predecessors, (35), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-15 19:53:01,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-15 19:53:01,052 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:53:01,052 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 19:53:01,053 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:53:01,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:01,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1731301129, now seen corresponding path program 1 times [2024-09-15 19:53:01,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:53:01,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642679770] [2024-09-15 19:53:01,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:01,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:53:01,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:53:01,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [925990133] [2024-09-15 19:53:01,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:01,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:53:01,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:53:01,248 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 19:53:01,250 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 19:53:01,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:01,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-15 19:53:01,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:53:01,425 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 19:53:01,434 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 19:53:01,443 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 11 treesize of output 7 [2024-09-15 19:53:01,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-15 19:53:01,559 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 19:53:01,560 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:53:01,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:53:01,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642679770] [2024-09-15 19:53:01,561 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:53:01,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925990133] [2024-09-15 19:53:01,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925990133] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:53:01,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:53:01,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-15 19:53:01,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476539031] [2024-09-15 19:53:01,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:53:01,568 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-15 19:53:01,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:53:01,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-15 19:53:01,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-15 19:53:01,591 INFO L87 Difference]: Start difference. First operand has 50 states, 28 states have (on average 1.25) internal successors, (35), 31 states have internal predecessors, (35), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 8 states, 6 states have (on average 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 19:53:01,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:53:01,775 INFO L93 Difference]: Finished difference Result 108 states and 152 transitions. [2024-09-15 19:53:01,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-15 19:53:01,780 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 19:53:01,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:53:01,796 INFO L225 Difference]: With dead ends: 108 [2024-09-15 19:53:01,796 INFO L226 Difference]: Without dead ends: 61 [2024-09-15 19:53:01,808 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 19:53:01,811 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 15 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:53:01,818 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 310 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:53:01,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-09-15 19:53:01,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2024-09-15 19:53:01,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 38 states have internal predecessors, (39), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2024-09-15 19:53:01,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2024-09-15 19:53:01,895 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 18 [2024-09-15 19:53:01,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:53:01,897 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2024-09-15 19:53:01,897 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 19:53:01,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:01,899 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2024-09-15 19:53:01,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-15 19:53:01,900 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:53:01,900 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] [2024-09-15 19:53:01,914 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-15 19:53:02,101 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-09-15 19:53:02,102 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:53:02,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:02,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1578239580, now seen corresponding path program 1 times [2024-09-15 19:53:02,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:53:02,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894640132] [2024-09-15 19:53:02,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:02,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:53:02,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:53:02,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2049776093] [2024-09-15 19:53:02,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:02,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:53:02,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:53:02,159 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 19:53:02,162 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 19:53:02,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:02,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-15 19:53:02,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:53:02,257 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 19:53:02,259 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 19:53:02,270 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 19:53:02,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:53:02,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-15 19:53:02,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:53:02,466 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 19:53:02,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:53:02,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:53:02,636 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 19:53:02,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:53:02,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894640132] [2024-09-15 19:53:02,636 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:53:02,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049776093] [2024-09-15 19:53:02,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049776093] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-15 19:53:02,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:53:02,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-09-15 19:53:02,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492957343] [2024-09-15 19:53:02,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:53:02,637 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-15 19:53:02,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:53:02,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-15 19:53:02,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-15 19:53:02,638 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 19:53:02,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:53:02,855 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2024-09-15 19:53:02,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-15 19:53:02,856 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-09-15 19:53:02,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:53:02,858 INFO L225 Difference]: With dead ends: 68 [2024-09-15 19:53:02,859 INFO L226 Difference]: Without dead ends: 66 [2024-09-15 19:53:02,859 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-09-15 19:53:02,861 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 15 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:53:02,861 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 277 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:53:02,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-15 19:53:02,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2024-09-15 19:53:02,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.105263157894737) internal successors, (42), 41 states have internal predecessors, (42), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2024-09-15 19:53:02,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2024-09-15 19:53:02,879 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 24 [2024-09-15 19:53:02,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:53:02,880 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2024-09-15 19:53:02,880 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 19:53:02,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:02,880 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2024-09-15 19:53:02,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-15 19:53:02,881 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:53:02,881 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 19:53:02,897 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-15 19:53:03,081 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:53:03,082 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:53:03,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:03,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1582649267, now seen corresponding path program 1 times [2024-09-15 19:53:03,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:53:03,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153834578] [2024-09-15 19:53:03,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:03,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:53:03,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:53:03,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [234669248] [2024-09-15 19:53:03,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:03,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:53:03,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:53:03,154 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 19:53:03,155 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 19:53:03,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:03,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-09-15 19:53:03,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:53:03,279 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 19:53:03,287 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 19:53:03,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:53:03,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:53:03,349 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 19:53:03,371 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:53:03,371 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:53:03,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:53:03,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153834578] [2024-09-15 19:53:03,371 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:53:03,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234669248] [2024-09-15 19:53:03,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234669248] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:53:03,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:53:03,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-15 19:53:03,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349021233] [2024-09-15 19:53:03,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:53:03,372 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-15 19:53:03,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:53:03,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-15 19:53:03,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-15 19:53:03,374 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-15 19:53:03,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:53:03,547 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2024-09-15 19:53:03,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-15 19:53:03,548 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2024-09-15 19:53:03,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:53:03,550 INFO L225 Difference]: With dead ends: 84 [2024-09-15 19:53:03,550 INFO L226 Difference]: Without dead ends: 82 [2024-09-15 19:53:03,550 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 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 19:53:03,551 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 19 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:53:03,551 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 266 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:53:03,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-09-15 19:53:03,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2024-09-15 19:53:03,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 51 states have internal predecessors, (53), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2024-09-15 19:53:03,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2024-09-15 19:53:03,566 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 34 [2024-09-15 19:53:03,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:53:03,566 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2024-09-15 19:53:03,566 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-15 19:53:03,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:03,566 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2024-09-15 19:53:03,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-15 19:53:03,567 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:53:03,567 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 19:53:03,581 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 19:53:03,769 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-09-15 19:53:03,770 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:53:03,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:03,770 INFO L85 PathProgramCache]: Analyzing trace with hash -372589770, now seen corresponding path program 1 times [2024-09-15 19:53:03,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:53:03,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77092856] [2024-09-15 19:53:03,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:03,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:53:03,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:53:03,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1589588953] [2024-09-15 19:53:03,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:03,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:53:03,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:53:03,816 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 19:53:03,817 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 19:53:03,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:03,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-15 19:53:03,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:53:03,905 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 19:53:03,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:53:03,925 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 19:53:03,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:53:03,988 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 19:53:04,007 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:53:04,008 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:53:04,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:53:04,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77092856] [2024-09-15 19:53:04,008 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:53:04,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589588953] [2024-09-15 19:53:04,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589588953] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:53:04,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:53:04,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-15 19:53:04,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230635381] [2024-09-15 19:53:04,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:53:04,010 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-15 19:53:04,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:53:04,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-15 19:53:04,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-15 19:53:04,013 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-15 19:53:04,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:53:04,201 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2024-09-15 19:53:04,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-15 19:53:04,201 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 34 [2024-09-15 19:53:04,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:53:04,202 INFO L225 Difference]: With dead ends: 88 [2024-09-15 19:53:04,202 INFO L226 Difference]: Without dead ends: 78 [2024-09-15 19:53:04,203 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 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 19:53:04,203 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 28 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:53:04,203 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 72 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 19:53:04,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-09-15 19:53:04,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-09-15 19:53:04,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 50 states have internal predecessors, (52), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2024-09-15 19:53:04,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2024-09-15 19:53:04,214 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 34 [2024-09-15 19:53:04,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:53:04,215 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2024-09-15 19:53:04,215 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-15 19:53:04,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:04,215 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2024-09-15 19:53:04,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-15 19:53:04,216 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:53:04,216 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:53:04,229 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 19:53:04,420 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:53:04,421 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:53:04,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:04,421 INFO L85 PathProgramCache]: Analyzing trace with hash 316523269, now seen corresponding path program 1 times [2024-09-15 19:53:04,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:53:04,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307547011] [2024-09-15 19:53:04,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:04,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:53:04,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:53:04,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1682030159] [2024-09-15 19:53:04,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:04,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:53:04,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:53:04,474 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 19:53:04,477 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 19:53:04,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:04,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-09-15 19:53:04,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:53:04,584 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 19:53:04,590 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 19:53:04,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:53:04,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:53:04,865 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 19:53:04,902 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 19:53:04,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:53:05,015 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 19:53:05,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:53:05,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307547011] [2024-09-15 19:53:05,015 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:53:05,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682030159] [2024-09-15 19:53:05,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682030159] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-15 19:53:05,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:53:05,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 11 [2024-09-15 19:53:05,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750243402] [2024-09-15 19:53:05,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:53:05,016 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-15 19:53:05,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:53:05,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-15 19:53:05,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-09-15 19:53:05,016 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-15 19:53:05,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:53:05,269 INFO L93 Difference]: Finished difference Result 111 states and 132 transitions. [2024-09-15 19:53:05,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-15 19:53:05,269 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 40 [2024-09-15 19:53:05,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:53:05,270 INFO L225 Difference]: With dead ends: 111 [2024-09-15 19:53:05,270 INFO L226 Difference]: Without dead ends: 109 [2024-09-15 19:53:05,271 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 62 SyntacticMatches, 8 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-09-15 19:53:05,271 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 24 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:53:05,271 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 298 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 19:53:05,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-09-15 19:53:05,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2024-09-15 19:53:05,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 70 states have internal predecessors, (72), 28 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (29), 25 states have call predecessors, (29), 26 states have call successors, (29) [2024-09-15 19:53:05,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 129 transitions. [2024-09-15 19:53:05,302 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 129 transitions. Word has length 40 [2024-09-15 19:53:05,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:53:05,302 INFO L474 AbstractCegarLoop]: Abstraction has 108 states and 129 transitions. [2024-09-15 19:53:05,303 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-15 19:53:05,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:05,303 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 129 transitions. [2024-09-15 19:53:05,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-15 19:53:05,304 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:53:05,304 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:53:05,329 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 19:53:05,508 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:53:05,508 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:53:05,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:05,509 INFO L85 PathProgramCache]: Analyzing trace with hash -889408325, now seen corresponding path program 1 times [2024-09-15 19:53:05,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:53:05,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479303995] [2024-09-15 19:53:05,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:05,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:53:05,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:06,350 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:53:06,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:06,352 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:53:06,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:06,393 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-15 19:53:06,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:06,398 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-15 19:53:06,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:06,401 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-15 19:53:06,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:06,404 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-15 19:53:06,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:06,408 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-15 19:53:06,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:53:06,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479303995] [2024-09-15 19:53:06,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479303995] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:53:06,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:53:06,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2024-09-15 19:53:06,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077756117] [2024-09-15 19:53:06,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:53:06,411 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-15 19:53:06,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:53:06,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-15 19:53:06,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2024-09-15 19:53:06,413 INFO L87 Difference]: Start difference. First operand 108 states and 129 transitions. Second operand has 16 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 8 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-15 19:53:06,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:53:06,775 INFO L93 Difference]: Finished difference Result 114 states and 134 transitions. [2024-09-15 19:53:06,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-15 19:53:06,777 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 8 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 46 [2024-09-15 19:53:06,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:53:06,778 INFO L225 Difference]: With dead ends: 114 [2024-09-15 19:53:06,778 INFO L226 Difference]: Without dead ends: 112 [2024-09-15 19:53:06,778 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2024-09-15 19:53:06,779 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 31 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 19:53:06,779 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 387 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 19:53:06,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-09-15 19:53:06,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2024-09-15 19:53:06,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 73 states have internal predecessors, (75), 28 states have call successors, (28), 15 states have call predecessors, (28), 14 states have return successors, (29), 25 states have call predecessors, (29), 26 states have call successors, (29) [2024-09-15 19:53:06,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 132 transitions. [2024-09-15 19:53:06,801 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 132 transitions. Word has length 46 [2024-09-15 19:53:06,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:53:06,801 INFO L474 AbstractCegarLoop]: Abstraction has 112 states and 132 transitions. [2024-09-15 19:53:06,802 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 8 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-15 19:53:06,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:06,802 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 132 transitions. [2024-09-15 19:53:06,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-15 19:53:06,803 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:53:06,803 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:53:06,803 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-15 19:53:06,805 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:53:06,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:06,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1594102023, now seen corresponding path program 1 times [2024-09-15 19:53:06,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:53:06,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243667933] [2024-09-15 19:53:06,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:06,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:53:06,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:53:06,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [477878758] [2024-09-15 19:53:06,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:06,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:53:06,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:53:06,858 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 19:53:06,860 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 19:53:06,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:06,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-15 19:53:06,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:53:06,976 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 19:53:07,079 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 19:53:07,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:53:07,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:53:07,480 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 28 treesize of output 16 [2024-09-15 19:53:07,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-15 19:53:07,543 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-15 19:53:07,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:53:07,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2024-09-15 19:53:11,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:53:11,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243667933] [2024-09-15 19:53:11,718 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:53:11,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477878758] [2024-09-15 19:53:11,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477878758] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:53:11,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:53:11,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-15 19:53:11,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221509086] [2024-09-15 19:53:11,719 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:53:11,719 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-15 19:53:11,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:53:11,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-15 19:53:11,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=327, Unknown=1, NotChecked=0, Total=380 [2024-09-15 19:53:11,720 INFO L87 Difference]: Start difference. First operand 112 states and 132 transitions. Second operand has 17 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 7 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-15 19:53:15,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:53:16,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:53:16,438 INFO L93 Difference]: Finished difference Result 151 states and 175 transitions. [2024-09-15 19:53:16,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-15 19:53:16,438 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 7 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 53 [2024-09-15 19:53:16,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:53:16,440 INFO L225 Difference]: With dead ends: 151 [2024-09-15 19:53:16,440 INFO L226 Difference]: Without dead ends: 149 [2024-09-15 19:53:16,440 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 10 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=129, Invalid=800, Unknown=1, NotChecked=0, Total=930 [2024-09-15 19:53:16,441 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 73 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-09-15 19:53:16,441 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 309 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 580 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2024-09-15 19:53:16,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-09-15 19:53:16,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2024-09-15 19:53:16,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 96 states have internal predecessors, (98), 34 states have call successors, (34), 20 states have call predecessors, (34), 20 states have return successors, (38), 30 states have call predecessors, (38), 31 states have call successors, (38) [2024-09-15 19:53:16,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 170 transitions. [2024-09-15 19:53:16,475 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 170 transitions. Word has length 53 [2024-09-15 19:53:16,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:53:16,475 INFO L474 AbstractCegarLoop]: Abstraction has 145 states and 170 transitions. [2024-09-15 19:53:16,475 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 7 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-15 19:53:16,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:16,476 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 170 transitions. [2024-09-15 19:53:16,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-15 19:53:16,477 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:53:16,478 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:53:16,493 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 19:53:16,678 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 19:53:16,678 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:53:16,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:16,679 INFO L85 PathProgramCache]: Analyzing trace with hash -161335246, now seen corresponding path program 1 times [2024-09-15 19:53:16,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:53:16,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711768292] [2024-09-15 19:53:16,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:16,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:53:16,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:53:16,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1854768480] [2024-09-15 19:53:16,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:16,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:53:16,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:53:16,719 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 19:53:16,721 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 19:53:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:16,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-15 19:53:16,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:53:16,847 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 19:53:16,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:53:16,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:53:16,867 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 19:53:16,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:53:16,929 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 19:53:16,955 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-15 19:53:16,955 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:53:16,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:53:16,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711768292] [2024-09-15 19:53:16,955 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:53:16,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854768480] [2024-09-15 19:53:16,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854768480] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:53:16,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:53:16,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-15 19:53:16,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201236128] [2024-09-15 19:53:16,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:53:16,956 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-15 19:53:16,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:53:16,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-15 19:53:16,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-15 19:53:16,957 INFO L87 Difference]: Start difference. First operand 145 states and 170 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-15 19:53:17,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:53:17,299 INFO L93 Difference]: Finished difference Result 162 states and 193 transitions. [2024-09-15 19:53:17,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-15 19:53:17,300 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 59 [2024-09-15 19:53:17,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:53:17,301 INFO L225 Difference]: With dead ends: 162 [2024-09-15 19:53:17,301 INFO L226 Difference]: Without dead ends: 160 [2024-09-15 19:53:17,301 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-09-15 19:53:17,302 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 36 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:53:17,302 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 141 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 19:53:17,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-09-15 19:53:17,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2024-09-15 19:53:17,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 97 states have (on average 1.0824742268041236) internal successors, (105), 104 states have internal predecessors, (105), 36 states have call successors, (36), 21 states have call predecessors, (36), 24 states have return successors, (47), 33 states have call predecessors, (47), 33 states have call successors, (47) [2024-09-15 19:53:17,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 188 transitions. [2024-09-15 19:53:17,331 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 188 transitions. Word has length 59 [2024-09-15 19:53:17,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:53:17,331 INFO L474 AbstractCegarLoop]: Abstraction has 158 states and 188 transitions. [2024-09-15 19:53:17,331 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-15 19:53:17,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:17,332 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 188 transitions. [2024-09-15 19:53:17,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-15 19:53:17,332 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:53:17,332 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:53:17,346 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 19:53:17,533 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 19:53:17,533 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:53:17,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:17,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1396822734, now seen corresponding path program 1 times [2024-09-15 19:53:17,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:53:17,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026610478] [2024-09-15 19:53:17,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:17,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:53:17,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:53:17,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1879739205] [2024-09-15 19:53:17,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:17,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:53:17,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:53:17,564 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 19:53:17,565 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 19:53:17,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:17,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-09-15 19:53:17,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:53:17,688 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 19:53:17,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:53:17,696 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 19:53:17,886 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 19:53:17,890 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 29 treesize of output 17 [2024-09-15 19:53:17,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-15 19:53:17,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-15 19:53:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 36 proven. 11 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-15 19:53:17,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:53:18,093 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-09-15 19:53:18,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:53:18,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026610478] [2024-09-15 19:53:18,093 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:53:18,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879739205] [2024-09-15 19:53:18,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879739205] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:53:18,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:53:18,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2024-09-15 19:53:18,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254498583] [2024-09-15 19:53:18,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:53:18,094 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-15 19:53:18,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:53:18,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-15 19:53:18,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-09-15 19:53:18,095 INFO L87 Difference]: Start difference. First operand 158 states and 188 transitions. Second operand has 15 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 8 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-15 19:53:18,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:53:18,663 INFO L93 Difference]: Finished difference Result 204 states and 247 transitions. [2024-09-15 19:53:18,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-15 19:53:18,664 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 8 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 62 [2024-09-15 19:53:18,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:53:18,666 INFO L225 Difference]: With dead ends: 204 [2024-09-15 19:53:18,666 INFO L226 Difference]: Without dead ends: 202 [2024-09-15 19:53:18,666 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 101 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2024-09-15 19:53:18,667 INFO L434 NwaCegarLoop]: 55 mSDtfsCounter, 81 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-15 19:53:18,667 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 364 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-15 19:53:18,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-09-15 19:53:18,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 196. [2024-09-15 19:53:18,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 120 states have (on average 1.0833333333333333) internal successors, (130), 127 states have internal predecessors, (130), 44 states have call successors, (44), 24 states have call predecessors, (44), 31 states have return successors, (64), 45 states have call predecessors, (64), 41 states have call successors, (64) [2024-09-15 19:53:18,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 238 transitions. [2024-09-15 19:53:18,700 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 238 transitions. Word has length 62 [2024-09-15 19:53:18,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:53:18,701 INFO L474 AbstractCegarLoop]: Abstraction has 196 states and 238 transitions. [2024-09-15 19:53:18,701 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 8 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-15 19:53:18,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:18,701 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 238 transitions. [2024-09-15 19:53:18,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-15 19:53:18,702 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:53:18,702 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:53:18,715 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-15 19:53:18,902 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:53:18,903 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:53:18,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:18,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1851795615, now seen corresponding path program 2 times [2024-09-15 19:53:18,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:53:18,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520496318] [2024-09-15 19:53:18,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:18,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:53:18,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:53:18,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [239848139] [2024-09-15 19:53:18,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 19:53:18,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:53:18,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:53:18,930 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:53:18,934 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-15 19:53:19,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 19:53:19,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:53:19,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 119 conjuncts are in the unsatisfiable core [2024-09-15 19:53:19,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:53:19,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-15 19:53:19,068 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 19:53:19,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:53:19,084 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 19:53:19,213 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 19:53:19,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:53:19,245 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 19:53:19,518 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 19:53:19,523 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 35 treesize of output 21 [2024-09-15 19:53:19,528 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 29 treesize of output 21 [2024-09-15 19:53:19,643 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 25 treesize of output 17 [2024-09-15 19:53:19,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-15 19:53:19,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-15 19:53:19,696 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-15 19:53:19,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:53:24,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:53:24,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520496318] [2024-09-15 19:53:24,220 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:53:24,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239848139] [2024-09-15 19:53:24,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239848139] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:53:24,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:53:24,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-15 19:53:24,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041263555] [2024-09-15 19:53:24,220 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:53:24,221 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-15 19:53:24,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:53:24,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-15 19:53:24,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=444, Unknown=1, NotChecked=0, Total=506 [2024-09-15 19:53:24,221 INFO L87 Difference]: Start difference. First operand 196 states and 238 transitions. Second operand has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-15 19:53:25,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:53:25,442 INFO L93 Difference]: Finished difference Result 326 states and 377 transitions. [2024-09-15 19:53:25,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-15 19:53:25,443 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 65 [2024-09-15 19:53:25,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:53:25,447 INFO L225 Difference]: With dead ends: 326 [2024-09-15 19:53:25,447 INFO L226 Difference]: Without dead ends: 324 [2024-09-15 19:53:25,448 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 52 SyntacticMatches, 11 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=126, Invalid=803, Unknown=1, NotChecked=0, Total=930 [2024-09-15 19:53:25,448 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 68 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-15 19:53:25,448 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 382 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-15 19:53:25,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2024-09-15 19:53:25,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 317. [2024-09-15 19:53:25,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 200 states have (on average 1.085) internal successors, (217), 210 states have internal predecessors, (217), 62 states have call successors, (62), 43 states have call predecessors, (62), 54 states have return successors, (91), 64 states have call predecessors, (91), 58 states have call successors, (91) [2024-09-15 19:53:25,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 370 transitions. [2024-09-15 19:53:25,524 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 370 transitions. Word has length 65 [2024-09-15 19:53:25,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:53:25,525 INFO L474 AbstractCegarLoop]: Abstraction has 317 states and 370 transitions. [2024-09-15 19:53:25,525 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-15 19:53:25,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:25,525 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 370 transitions. [2024-09-15 19:53:25,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-09-15 19:53:25,528 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:53:25,528 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:53:25,542 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-15 19:53:25,729 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-15 19:53:25,729 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:53:25,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:25,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1323270614, now seen corresponding path program 1 times [2024-09-15 19:53:25,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:53:25,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073512898] [2024-09-15 19:53:25,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:25,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:53:25,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:53:25,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1605985174] [2024-09-15 19:53:25,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:25,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:53:25,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:53:25,773 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:53:25,775 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-15 19:53:25,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:25,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 160 conjuncts are in the unsatisfiable core [2024-09-15 19:53:25,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:53:25,934 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 19:53:25,938 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 19:53:25,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:53:25,951 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 19:53:25,958 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 19:53:25,972 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 19:53:26,402 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 19:53:30,641 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_func_to_recursive_line_32_to_55_0_#in~r.base_BEFORE_CALL_3| Int) (|v_func_to_recursive_line_32_to_55_0_#in~r.offset_BEFORE_CALL_3| Int) (|v_func_to_recursive_line_32_to_55_0_#in~y.offset_BEFORE_CALL_3| Int) (|v_func_to_recursive_line_32_to_55_0_#in~y.base_BEFORE_CALL_3| Int)) (<= (select (select |c_#memory_int#2| |v_func_to_recursive_line_32_to_55_0_#in~y.base_BEFORE_CALL_3|) |v_func_to_recursive_line_32_to_55_0_#in~y.offset_BEFORE_CALL_3|) (select (select |c_#memory_int#3| |v_func_to_recursive_line_32_to_55_0_#in~r.base_BEFORE_CALL_3|) |v_func_to_recursive_line_32_to_55_0_#in~r.offset_BEFORE_CALL_3|))) is different from true [2024-09-15 19:53:31,315 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 29 treesize of output 21 [2024-09-15 19:53:31,469 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:53:31,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2024-09-15 19:53:52,962 INFO L349 Elim1Store]: treesize reduction 22, result has 56.0 percent of original size [2024-09-15 19:53:52,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 73 [2024-09-15 19:53:53,034 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 36 treesize of output 13 [2024-09-15 19:53:53,179 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 38 treesize of output 26 [2024-09-15 19:53:53,272 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:53:53,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 114 treesize of output 198 [2024-09-15 19:53:53,327 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:53:53,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 91 [2024-09-15 19:53:53,357 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 97 treesize of output 69 [2024-09-15 19:53:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 47 proven. 17 refuted. 3 times theorem prover too weak. 11 trivial. 29 not checked. [2024-09-15 19:53:57,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:54:04,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:54:04,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073512898] [2024-09-15 19:54:04,271 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:54:04,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605985174] [2024-09-15 19:54:04,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605985174] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:54:04,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:54:04,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2024-09-15 19:54:04,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512496774] [2024-09-15 19:54:04,272 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:54:04,272 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-15 19:54:04,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:54:04,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-15 19:54:04,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=895, Unknown=7, NotChecked=60, Total=1056 [2024-09-15 19:54:04,273 INFO L87 Difference]: Start difference. First operand 317 states and 370 transitions. Second operand has 30 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 10 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-09-15 19:54:08,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:54:12,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:54:17,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:54:21,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:54:25,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:54:29,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:54:33,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:54:37,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:54:41,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:54:45,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:54:49,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:54:54,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:54:58,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:55:02,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:55:07,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:55:14,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:55:18,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:55:22,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:55:26,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:55:30,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:55:34,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:55:38,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:55:41,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:55:45,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:55:45,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:55:45,896 INFO L93 Difference]: Finished difference Result 437 states and 514 transitions. [2024-09-15 19:55:45,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-09-15 19:55:45,897 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 10 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) Word has length 77 [2024-09-15 19:55:45,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:55:45,899 INFO L225 Difference]: With dead ends: 437 [2024-09-15 19:55:45,899 INFO L226 Difference]: Without dead ends: 411 [2024-09-15 19:55:45,901 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 38.2s TimeCoverageRelationStatistics Valid=420, Invalid=3736, Unknown=8, NotChecked=126, Total=4290 [2024-09-15 19:55:45,901 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 112 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 1871 mSolverCounterSat, 84 mSolverCounterUnsat, 27 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 96.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 2137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1871 IncrementalHoareTripleChecker+Invalid, 27 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 98.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:55:45,902 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 144 Invalid, 2137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1871 Invalid, 27 Unknown, 155 Unchecked, 98.2s Time] [2024-09-15 19:55:45,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2024-09-15 19:55:45,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 404. [2024-09-15 19:55:45,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 256 states have (on average 1.08984375) internal successors, (279), 268 states have internal predecessors, (279), 79 states have call successors, (79), 55 states have call predecessors, (79), 68 states have return successors, (114), 80 states have call predecessors, (114), 75 states have call successors, (114) [2024-09-15 19:55:45,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 472 transitions. [2024-09-15 19:55:45,988 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 472 transitions. Word has length 77 [2024-09-15 19:55:45,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:55:45,988 INFO L474 AbstractCegarLoop]: Abstraction has 404 states and 472 transitions. [2024-09-15 19:55:45,988 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 10 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-09-15 19:55:45,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:55:45,989 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 472 transitions. [2024-09-15 19:55:45,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-09-15 19:55:45,989 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:55:45,989 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:55:46,003 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-15 19:55:46,190 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-15 19:55:46,190 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:55:46,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:55:46,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1223510810, now seen corresponding path program 2 times [2024-09-15 19:55:46,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:55:46,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548460846] [2024-09-15 19:55:46,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:55:46,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:55:46,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:55:46,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [748068513] [2024-09-15 19:55:46,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 19:55:46,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:55:46,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:55:46,227 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:55:46,228 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-15 19:55:46,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 19:55:46,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:55:46,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 108 conjuncts are in the unsatisfiable core [2024-09-15 19:55:46,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:55:46,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-15 19:55:46,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:55:46,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:55:46,607 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 19:55:47,160 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 29 treesize of output 17 [2024-09-15 19:55:47,167 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 19:55:47,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-15 19:55:47,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-15 19:55:47,711 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 24 treesize of output 12 [2024-09-15 19:55:47,814 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-15 19:55:47,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:55:47,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2024-09-15 19:55:56,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:55:56,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548460846] [2024-09-15 19:55:56,114 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:55:56,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748068513] [2024-09-15 19:55:56,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748068513] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:55:56,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:55:56,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-15 19:55:56,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805723841] [2024-09-15 19:55:56,115 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:55:56,115 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-15 19:55:56,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:55:56,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-15 19:55:56,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=493, Unknown=1, NotChecked=0, Total=552 [2024-09-15 19:55:56,116 INFO L87 Difference]: Start difference. First operand 404 states and 472 transitions. Second operand has 21 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 8 states have call successors, (16), 8 states have call predecessors, (16), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2024-09-15 19:55:57,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:55:57,924 INFO L93 Difference]: Finished difference Result 445 states and 516 transitions. [2024-09-15 19:55:57,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-15 19:55:57,925 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 8 states have call successors, (16), 8 states have call predecessors, (16), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 81 [2024-09-15 19:55:57,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:55:57,927 INFO L225 Difference]: With dead ends: 445 [2024-09-15 19:55:57,927 INFO L226 Difference]: Without dead ends: 443 [2024-09-15 19:55:57,928 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 48 SyntacticMatches, 17 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=111, Invalid=944, Unknown=1, NotChecked=0, Total=1056 [2024-09-15 19:55:57,928 INFO L434 NwaCegarLoop]: 59 mSDtfsCounter, 59 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-15 19:55:57,929 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 619 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-15 19:55:57,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2024-09-15 19:55:58,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 440. [2024-09-15 19:55:58,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 280 states have (on average 1.0892857142857142) internal successors, (305), 293 states have internal predecessors, (305), 84 states have call successors, (84), 61 states have call predecessors, (84), 75 states have return successors, (123), 85 states have call predecessors, (123), 79 states have call successors, (123) [2024-09-15 19:55:58,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 512 transitions. [2024-09-15 19:55:58,023 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 512 transitions. Word has length 81 [2024-09-15 19:55:58,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:55:58,023 INFO L474 AbstractCegarLoop]: Abstraction has 440 states and 512 transitions. [2024-09-15 19:55:58,023 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 8 states have call successors, (16), 8 states have call predecessors, (16), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2024-09-15 19:55:58,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:55:58,023 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 512 transitions. [2024-09-15 19:55:58,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-09-15 19:55:58,024 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:55:58,024 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:55:58,037 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-15 19:55:58,224 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:55:58,225 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:55:58,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:55:58,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1472240640, now seen corresponding path program 3 times [2024-09-15 19:55:58,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:55:58,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444202938] [2024-09-15 19:55:58,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:55:58,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:55:58,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:55:59,047 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:55:59,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:55:59,050 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:55:59,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:55:59,051 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-15 19:55:59,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:55:59,052 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-15 19:55:59,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:55:59,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-15 19:55:59,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:55:59,294 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-15 19:55:59,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:55:59,297 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-15 19:55:59,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:55:59,301 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-15 19:55:59,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:55:59,303 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-15 19:55:59,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:55:59,306 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-15 19:55:59,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:55:59,310 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-15 19:55:59,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:55:59,312 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-15 19:55:59,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:55:59,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444202938] [2024-09-15 19:55:59,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444202938] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:55:59,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:55:59,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-09-15 19:55:59,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139875978] [2024-09-15 19:55:59,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:55:59,313 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-15 19:55:59,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:55:59,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-15 19:55:59,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2024-09-15 19:55:59,314 INFO L87 Difference]: Start difference. First operand 440 states and 512 transitions. Second operand has 14 states, 10 states have (on average 3.3) internal successors, (33), 11 states have internal predecessors, (33), 8 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (11), 5 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-15 19:56:00,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:56:00,205 INFO L93 Difference]: Finished difference Result 467 states and 543 transitions. [2024-09-15 19:56:00,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-15 19:56:00,205 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 3.3) internal successors, (33), 11 states have internal predecessors, (33), 8 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (11), 5 states have call predecessors, (11), 8 states have call successors, (11) Word has length 81 [2024-09-15 19:56:00,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:56:00,207 INFO L225 Difference]: With dead ends: 467 [2024-09-15 19:56:00,207 INFO L226 Difference]: Without dead ends: 255 [2024-09-15 19:56:00,208 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2024-09-15 19:56:00,208 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 40 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-15 19:56:00,209 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 183 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-15 19:56:00,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2024-09-15 19:56:00,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2024-09-15 19:56:00,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 163 states have (on average 1.0736196319018405) internal successors, (175), 169 states have internal predecessors, (175), 47 states have call successors, (47), 37 states have call predecessors, (47), 44 states have return successors, (62), 48 states have call predecessors, (62), 43 states have call successors, (62) [2024-09-15 19:56:00,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 284 transitions. [2024-09-15 19:56:00,268 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 284 transitions. Word has length 81 [2024-09-15 19:56:00,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:56:00,268 INFO L474 AbstractCegarLoop]: Abstraction has 255 states and 284 transitions. [2024-09-15 19:56:00,268 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 3.3) internal successors, (33), 11 states have internal predecessors, (33), 8 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (11), 5 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-15 19:56:00,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:00,268 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 284 transitions. [2024-09-15 19:56:00,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-09-15 19:56:00,269 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:56:00,269 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:56:00,269 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-09-15 19:56:00,269 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:56:00,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:00,269 INFO L85 PathProgramCache]: Analyzing trace with hash -987042471, now seen corresponding path program 1 times [2024-09-15 19:56:00,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:56:00,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329483346] [2024-09-15 19:56:00,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:56:00,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:56:00,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:56:00,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603131083] [2024-09-15 19:56:00,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:56:00,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:56:00,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:56:00,305 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:56:00,306 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-15 19:56:00,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:00,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-09-15 19:56:00,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:56:00,451 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 19:56:00,455 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 19:56:00,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:56:00,481 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 19:56:00,790 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 19:56:00,795 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 29 treesize of output 17 [2024-09-15 19:56:00,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-15 19:56:00,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-15 19:56:00,901 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-09-15 19:56:00,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:56:01,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:56:01,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329483346] [2024-09-15 19:56:01,355 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:56:01,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603131083] [2024-09-15 19:56:01,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603131083] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:56:01,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:56:01,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-09-15 19:56:01,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759587056] [2024-09-15 19:56:01,356 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:56:01,356 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-15 19:56:01,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:56:01,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-15 19:56:01,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-09-15 19:56:01,357 INFO L87 Difference]: Start difference. First operand 255 states and 284 transitions. Second operand has 12 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 7 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-15 19:56:02,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:56:02,114 INFO L93 Difference]: Finished difference Result 278 states and 314 transitions. [2024-09-15 19:56:02,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-15 19:56:02,115 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 7 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 89 [2024-09-15 19:56:02,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:56:02,116 INFO L225 Difference]: With dead ends: 278 [2024-09-15 19:56:02,116 INFO L226 Difference]: Without dead ends: 276 [2024-09-15 19:56:02,117 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2024-09-15 19:56:02,117 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 38 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-15 19:56:02,117 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 173 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-15 19:56:02,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2024-09-15 19:56:02,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2024-09-15 19:56:02,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 177 states have (on average 1.073446327683616) internal successors, (190), 183 states have internal predecessors, (190), 50 states have call successors, (50), 40 states have call predecessors, (50), 48 states have return successors, (71), 52 states have call predecessors, (71), 46 states have call successors, (71) [2024-09-15 19:56:02,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 311 transitions. [2024-09-15 19:56:02,177 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 311 transitions. Word has length 89 [2024-09-15 19:56:02,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:56:02,178 INFO L474 AbstractCegarLoop]: Abstraction has 276 states and 311 transitions. [2024-09-15 19:56:02,178 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 7 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-15 19:56:02,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:02,182 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 311 transitions. [2024-09-15 19:56:02,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-09-15 19:56:02,183 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:56:02,183 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:56:02,197 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-15 19:56:02,383 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-15 19:56:02,384 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:56:02,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:02,384 INFO L85 PathProgramCache]: Analyzing trace with hash -568318842, now seen corresponding path program 2 times [2024-09-15 19:56:02,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:56:02,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488611338] [2024-09-15 19:56:02,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:56:02,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:56:02,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:56:02,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [888963411] [2024-09-15 19:56:02,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 19:56:02,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:56:02,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:56:02,433 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:56:02,434 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-15 19:56:02,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 19:56:02,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:56:02,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 162 conjuncts are in the unsatisfiable core [2024-09-15 19:56:02,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:56:02,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-15 19:56:02,615 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 19:56:02,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:56:02,671 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 19:56:03,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:56:03,122 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 19:56:03,188 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 11 treesize of output 7 [2024-09-15 19:56:04,599 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 19:56:04,619 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 29 treesize of output 17 [2024-09-15 19:56:04,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2024-09-15 19:56:04,781 INFO L349 Elim1Store]: treesize reduction 24, result has 53.8 percent of original size [2024-09-15 19:56:04,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 57 [2024-09-15 19:56:04,866 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-15 19:56:04,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-09-15 19:56:10,236 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:56:10,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 146 [2024-09-15 19:56:10,305 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:56:10,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 78 treesize of output 162 [2024-09-15 19:56:10,325 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:56:10,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 156 treesize of output 124 [2024-09-15 19:56:10,507 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-09-15 19:56:10,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:56:15,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:56:15,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488611338] [2024-09-15 19:56:15,252 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:56:15,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888963411] [2024-09-15 19:56:15,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888963411] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:56:15,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:56:15,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-15 19:56:15,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552293136] [2024-09-15 19:56:15,253 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:56:15,253 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-15 19:56:15,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:56:15,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-15 19:56:15,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=728, Unknown=1, NotChecked=0, Total=812 [2024-09-15 19:56:15,254 INFO L87 Difference]: Start difference. First operand 276 states and 311 transitions. Second operand has 21 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 10 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2024-09-15 19:56:17,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:56:17,912 INFO L93 Difference]: Finished difference Result 364 states and 408 transitions. [2024-09-15 19:56:17,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-15 19:56:17,913 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 10 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) Word has length 95 [2024-09-15 19:56:17,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:56:17,915 INFO L225 Difference]: With dead ends: 364 [2024-09-15 19:56:17,915 INFO L226 Difference]: Without dead ends: 360 [2024-09-15 19:56:17,918 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 67 SyntacticMatches, 18 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=166, Invalid=1393, Unknown=1, NotChecked=0, Total=1560 [2024-09-15 19:56:17,918 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 59 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-15 19:56:17,918 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 409 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-09-15 19:56:17,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2024-09-15 19:56:18,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 352. [2024-09-15 19:56:18,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 226 states have (on average 1.075221238938053) internal successors, (243), 234 states have internal predecessors, (243), 64 states have call successors, (64), 51 states have call predecessors, (64), 61 states have return successors, (91), 66 states have call predecessors, (91), 60 states have call successors, (91) [2024-09-15 19:56:18,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 398 transitions. [2024-09-15 19:56:18,033 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 398 transitions. Word has length 95 [2024-09-15 19:56:18,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:56:18,033 INFO L474 AbstractCegarLoop]: Abstraction has 352 states and 398 transitions. [2024-09-15 19:56:18,033 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 10 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2024-09-15 19:56:18,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:18,033 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 398 transitions. [2024-09-15 19:56:18,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-15 19:56:18,034 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:56:18,034 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2024-09-15 19:56:18,048 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-15 19:56:18,234 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-15 19:56:18,235 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:56:18,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:18,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1765205061, now seen corresponding path program 3 times [2024-09-15 19:56:18,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:56:18,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680861214] [2024-09-15 19:56:18,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:56:18,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:56:18,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:56:18,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1243065634] [2024-09-15 19:56:18,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 19:56:18,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:56:18,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:56:18,264 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:56:18,268 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-15 19:56:18,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-15 19:56:18,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:56:18,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-15 19:56:18,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:56:36,355 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 25 treesize of output 17 [2024-09-15 19:56:36,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-09-15 19:56:36,657 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 23 treesize of output 15 [2024-09-15 19:56:36,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:56:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 149 proven. 9 refuted. 2 times theorem prover too weak. 210 trivial. 0 not checked. [2024-09-15 19:56:41,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:56:44,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2024-09-15 19:56:55,834 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 71 proven. 7 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2024-09-15 19:56:55,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:56:55,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680861214] [2024-09-15 19:56:55,835 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:56:55,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243065634] [2024-09-15 19:56:55,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243065634] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:56:55,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:56:55,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2024-09-15 19:56:55,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682268725] [2024-09-15 19:56:55,835 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:56:55,835 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-15 19:56:55,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:56:55,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-15 19:56:55,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=289, Unknown=4, NotChecked=0, Total=342 [2024-09-15 19:56:55,836 INFO L87 Difference]: Start difference. First operand 352 states and 398 transitions. Second operand has 19 states, 16 states have (on average 3.0) internal successors, (48), 18 states have internal predecessors, (48), 6 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (15), 3 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-15 19:56:59,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-15 19:57:03,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:57:03,606 INFO L93 Difference]: Finished difference Result 362 states and 407 transitions. [2024-09-15 19:57:03,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-15 19:57:03,606 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 3.0) internal successors, (48), 18 states have internal predecessors, (48), 6 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (15), 3 states have call predecessors, (15), 5 states have call successors, (15) Word has length 109 [2024-09-15 19:57:03,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:57:03,608 INFO L225 Difference]: With dead ends: 362 [2024-09-15 19:57:03,608 INFO L226 Difference]: Without dead ends: 360 [2024-09-15 19:57:03,609 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 196 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 39.4s TimeCoverageRelationStatistics Valid=110, Invalid=588, Unknown=4, NotChecked=0, Total=702 [2024-09-15 19:57:03,609 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 34 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2024-09-15 19:57:03,610 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 362 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 485 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2024-09-15 19:57:03,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2024-09-15 19:57:03,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 355. [2024-09-15 19:57:03,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 229 states have (on average 1.0698689956331877) internal successors, (245), 236 states have internal predecessors, (245), 63 states have call successors, (63), 52 states have call predecessors, (63), 62 states have return successors, (90), 66 states have call predecessors, (90), 59 states have call successors, (90) [2024-09-15 19:57:03,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 398 transitions. [2024-09-15 19:57:03,745 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 398 transitions. Word has length 109 [2024-09-15 19:57:03,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:57:03,746 INFO L474 AbstractCegarLoop]: Abstraction has 355 states and 398 transitions. [2024-09-15 19:57:03,746 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 3.0) internal successors, (48), 18 states have internal predecessors, (48), 6 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (15), 3 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-15 19:57:03,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:57:03,746 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 398 transitions. [2024-09-15 19:57:03,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-09-15 19:57:03,748 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:57:03,748 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:57:03,766 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-15 19:57:03,952 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-15 19:57:03,953 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:57:03,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:57:03,953 INFO L85 PathProgramCache]: Analyzing trace with hash -944121027, now seen corresponding path program 1 times [2024-09-15 19:57:03,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:57:03,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727883934] [2024-09-15 19:57:03,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:57:03,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:57:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:57:03,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606895333] [2024-09-15 19:57:03,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:57:03,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:57:03,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:57:03,999 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:57:04,001 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-15 19:57:04,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:04,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 171 conjuncts are in the unsatisfiable core [2024-09-15 19:57:04,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:57:04,175 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 19:57:04,179 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 19:57:04,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:57:04,221 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 19:57:04,242 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 19:57:04,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:57:04,634 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 19:57:04,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:57:05,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:57:05,162 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 29 treesize of output 17 [2024-09-15 19:57:05,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-15 19:57:05,447 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 13 treesize of output 9 [2024-09-15 19:57:06,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2024-09-15 19:57:06,279 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 35 treesize of output 23 [2024-09-15 19:57:06,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-09-15 19:57:06,399 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 38 treesize of output 26 [2024-09-15 19:57:06,425 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:57:06,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 52 [2024-09-15 19:57:06,434 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 38 treesize of output 26 [2024-09-15 19:57:06,439 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 30 treesize of output 18 [2024-09-15 19:57:06,604 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 31 proven. 40 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2024-09-15 19:57:06,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:57:09,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2024-09-15 19:57:09,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2024-09-15 19:57:13,716 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((|v_func_to_recursive_line_32_to_55_0_#in~y.base_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_32_to_55_0_#in~q.offset_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_32_to_55_0_#in~r.base_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_32_to_55_0_#in~r.offset_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_32_to_55_0_#in~x.base_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_32_to_55_0_#in~y.offset_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_32_to_55_0_#in~x.offset_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_32_to_55_0_#in~q.base_BEFORE_CALL_13| Int)) (let ((.cse1 (select (select |c_#memory_int#1| |v_func_to_recursive_line_32_to_55_0_#in~x.base_BEFORE_CALL_13|) |v_func_to_recursive_line_32_to_55_0_#in~x.offset_BEFORE_CALL_13|)) (.cse0 (select (select |c_#memory_int#2| |v_func_to_recursive_line_32_to_55_0_#in~y.base_BEFORE_CALL_13|) |v_func_to_recursive_line_32_to_55_0_#in~y.offset_BEFORE_CALL_13|))) (or (not (= (+ (select (select |c_old(#memory_int#3)| |v_func_to_recursive_line_32_to_55_0_#in~r.base_BEFORE_CALL_13|) |v_func_to_recursive_line_32_to_55_0_#in~r.offset_BEFORE_CALL_13|) (* .cse0 (select (select |c_old(#memory_int#6)| |v_func_to_recursive_line_32_to_55_0_#in~q.base_BEFORE_CALL_13|) |v_func_to_recursive_line_32_to_55_0_#in~q.offset_BEFORE_CALL_13|))) .cse1)) (= .cse1 (+ (select (select |c_#memory_int#3| |v_func_to_recursive_line_32_to_55_0_#in~r.base_BEFORE_CALL_13|) |v_func_to_recursive_line_32_to_55_0_#in~r.offset_BEFORE_CALL_13|) (* .cse0 (select (select |c_#memory_int#6| |v_func_to_recursive_line_32_to_55_0_#in~q.base_BEFORE_CALL_13|) |v_func_to_recursive_line_32_to_55_0_#in~q.offset_BEFORE_CALL_13|))))))) (or (< (+ (select (select |c_old(#memory_int#3)| |c_func_to_recursive_line_32_to_55_0_#in~r.base|) |c_func_to_recursive_line_32_to_55_0_#in~r.offset|) (* (select (select |c_old(#memory_int#6)| |c_func_to_recursive_line_32_to_55_0_#in~q.base|) |c_func_to_recursive_line_32_to_55_0_#in~q.offset|) (select (select |c_#memory_int#2| |c_func_to_recursive_line_32_to_55_0_#in~y.base|) |c_func_to_recursive_line_32_to_55_0_#in~y.offset|))) (+ (select (select |c_#memory_int#1| |c_func_to_recursive_line_32_to_55_0_#in~x.base|) |c_func_to_recursive_line_32_to_55_0_#in~x.offset|) 1)) (forall ((|v_func_to_recursive_line_32_to_55_0_#in~y.base_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_32_to_55_0_#in~q.offset_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_32_to_55_0_#in~r.base_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_32_to_55_0_#in~r.offset_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_32_to_55_0_#in~x.base_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_32_to_55_0_#in~y.offset_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_32_to_55_0_#in~x.offset_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_32_to_55_0_#in~q.base_BEFORE_CALL_13| Int)) (= (select (select |c_#memory_int#1| |v_func_to_recursive_line_32_to_55_0_#in~x.base_BEFORE_CALL_13|) |v_func_to_recursive_line_32_to_55_0_#in~x.offset_BEFORE_CALL_13|) (+ (select (select |c_#memory_int#3| |v_func_to_recursive_line_32_to_55_0_#in~r.base_BEFORE_CALL_13|) |v_func_to_recursive_line_32_to_55_0_#in~r.offset_BEFORE_CALL_13|) (* (select (select |c_#memory_int#2| |v_func_to_recursive_line_32_to_55_0_#in~y.base_BEFORE_CALL_13|) |v_func_to_recursive_line_32_to_55_0_#in~y.offset_BEFORE_CALL_13|) (select (select |c_#memory_int#6| |v_func_to_recursive_line_32_to_55_0_#in~q.base_BEFORE_CALL_13|) |v_func_to_recursive_line_32_to_55_0_#in~q.offset_BEFORE_CALL_13|))))))) is different from false [2024-09-15 19:57:13,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:57:13,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727883934] [2024-09-15 19:57:13,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:57:13,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606895333] [2024-09-15 19:57:13,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606895333] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:57:13,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:57:13,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-09-15 19:57:13,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499121264] [2024-09-15 19:57:13,923 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:57:13,923 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-15 19:57:13,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:57:13,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-15 19:57:13,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=944, Unknown=1, NotChecked=62, Total=1122 [2024-09-15 19:57:13,924 INFO L87 Difference]: Start difference. First operand 355 states and 398 transitions. Second operand has 27 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 12 states have call successors, (19), 6 states have call predecessors, (19), 8 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2024-09-15 19:57:18,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:57:20,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:57:20,853 INFO L93 Difference]: Finished difference Result 357 states and 399 transitions. [2024-09-15 19:57:20,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-15 19:57:20,854 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 12 states have call successors, (19), 6 states have call predecessors, (19), 8 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) Word has length 107 [2024-09-15 19:57:20,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:57:20,856 INFO L225 Difference]: With dead ends: 357 [2024-09-15 19:57:20,856 INFO L226 Difference]: Without dead ends: 347 [2024-09-15 19:57:20,856 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=245, Invalid=1920, Unknown=1, NotChecked=90, Total=2256 [2024-09-15 19:57:20,857 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 58 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 55 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2024-09-15 19:57:20,857 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 161 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 981 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2024-09-15 19:57:20,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2024-09-15 19:57:21,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2024-09-15 19:57:21,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 224 states have (on average 1.0669642857142858) internal successors, (239), 231 states have internal predecessors, (239), 62 states have call successors, (62), 51 states have call predecessors, (62), 60 states have return successors, (88), 64 states have call predecessors, (88), 59 states have call successors, (88) [2024-09-15 19:57:21,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 389 transitions. [2024-09-15 19:57:21,003 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 389 transitions. Word has length 107 [2024-09-15 19:57:21,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:57:21,003 INFO L474 AbstractCegarLoop]: Abstraction has 347 states and 389 transitions. [2024-09-15 19:57:21,003 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 12 states have call successors, (19), 6 states have call predecessors, (19), 8 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2024-09-15 19:57:21,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:57:21,004 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 389 transitions. [2024-09-15 19:57:21,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-09-15 19:57:21,005 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:57:21,005 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:57:21,020 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-15 19:57:21,205 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-15 19:57:21,205 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:57:21,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:57:21,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1083053593, now seen corresponding path program 3 times [2024-09-15 19:57:21,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:57:21,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153787371] [2024-09-15 19:57:21,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:57:21,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:57:21,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:57:21,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1811023155] [2024-09-15 19:57:21,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 19:57:21,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:57:21,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:57:21,238 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:57:21,239 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-15 19:57:21,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-15 19:57:21,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:57:21,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 203 conjuncts are in the unsatisfiable core [2024-09-15 19:57:21,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:57:21,495 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 19:57:21,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-15 19:57:21,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:57:21,591 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 19:57:22,615 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 35 treesize of output 21 [2024-09-15 19:57:22,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-15 19:57:22,806 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 25 treesize of output 17 [2024-09-15 19:57:22,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11