./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra-u.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 27b49876 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_dijkstra-u.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 0464cc7a685168b5fc1a1b0dd8da6141b4b98c7c538345750bda8185cd005644 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-27b4987-m [2024-09-21 12:34:45,276 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-21 12:34:45,351 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-21 12:34:45,366 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-21 12:34:45,367 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-21 12:34:45,397 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-21 12:34:45,398 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-21 12:34:45,398 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-21 12:34:45,399 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-21 12:34:45,400 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-21 12:34:45,400 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-21 12:34:45,401 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-21 12:34:45,401 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-21 12:34:45,402 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-21 12:34:45,402 INFO L153 SettingsManager]: * Use SBE=true [2024-09-21 12:34:45,402 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-21 12:34:45,403 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-21 12:34:45,403 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-21 12:34:45,403 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-21 12:34:45,404 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-21 12:34:45,404 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-21 12:34:45,407 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-21 12:34:45,408 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-21 12:34:45,408 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-21 12:34:45,408 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-21 12:34:45,408 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-21 12:34:45,409 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-21 12:34:45,409 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-21 12:34:45,409 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-21 12:34:45,409 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-21 12:34:45,410 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-21 12:34:45,410 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-21 12:34:45,410 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 12:34:45,410 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-21 12:34:45,410 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-21 12:34:45,411 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-21 12:34:45,411 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-21 12:34:45,413 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-21 12:34:45,413 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-21 12:34:45,413 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-21 12:34:45,413 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-21 12:34:45,414 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-21 12:34:45,414 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0464cc7a685168b5fc1a1b0dd8da6141b4b98c7c538345750bda8185cd005644 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-21 12:34:45,685 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-21 12:34:45,709 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-21 12:34:45,711 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-21 12:34:45,712 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-21 12:34:45,713 INFO L274 PluginConnector]: CDTParser initialized [2024-09-21 12:34:45,714 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra-u.c [2024-09-21 12:34:47,136 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-21 12:34:47,318 INFO L384 CDTParser]: Found 1 translation units. [2024-09-21 12:34:47,319 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra-u.c [2024-09-21 12:34:47,327 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/e089d268d/e3ab7a3d9b2f4c4fa52491c5d49c7af2/FLAG72e0648dc [2024-09-21 12:34:47,342 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/e089d268d/e3ab7a3d9b2f4c4fa52491c5d49c7af2 [2024-09-21 12:34:47,345 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-21 12:34:47,348 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-21 12:34:47,350 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-21 12:34:47,351 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-21 12:34:47,356 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-21 12:34:47,357 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:34:47" (1/1) ... [2024-09-21 12:34:47,358 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a3c0fec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:47, skipping insertion in model container [2024-09-21 12:34:47,359 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:34:47" (1/1) ... [2024-09-21 12:34:47,384 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-21 12:34:47,553 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_dijkstra-u.c[1076,1089] [2024-09-21 12:34:47,603 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 12:34:47,622 INFO L200 MainTranslator]: Completed pre-run [2024-09-21 12:34:47,640 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_dijkstra-u.c[1076,1089] [2024-09-21 12:34:47,676 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 12:34:47,702 INFO L204 MainTranslator]: Completed translation [2024-09-21 12:34:47,702 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:47 WrapperNode [2024-09-21 12:34:47,702 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-21 12:34:47,704 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-21 12:34:47,704 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-21 12:34:47,704 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-21 12:34:47,712 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:47" (1/1) ... [2024-09-21 12:34:47,726 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:47" (1/1) ... [2024-09-21 12:34:47,740 INFO L138 Inliner]: procedures = 17, calls = 173, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-21 12:34:47,741 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-21 12:34:47,742 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-21 12:34:47,742 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-21 12:34:47,742 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-21 12:34:47,751 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:47" (1/1) ... [2024-09-21 12:34:47,751 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:47" (1/1) ... [2024-09-21 12:34:47,755 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:47" (1/1) ... [2024-09-21 12:34:47,787 INFO L175 MemorySlicer]: Split 139 memory accesses to 6 slices as follows [2, 29, 30, 35, 21, 22]. 25 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 11 writes are split as follows [0, 3, 2, 3, 1, 2]. [2024-09-21 12:34:47,788 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:47" (1/1) ... [2024-09-21 12:34:47,788 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:47" (1/1) ... [2024-09-21 12:34:47,803 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:47" (1/1) ... [2024-09-21 12:34:47,807 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:47" (1/1) ... [2024-09-21 12:34:47,809 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:47" (1/1) ... [2024-09-21 12:34:47,811 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:47" (1/1) ... [2024-09-21 12:34:47,815 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-21 12:34:47,816 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-21 12:34:47,816 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-21 12:34:47,816 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-21 12:34:47,817 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:47" (1/1) ... [2024-09-21 12:34:47,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 12:34:47,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:34:47,854 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) [2024-09-21 12:34:47,858 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 [2024-09-21 12:34:47,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-21 12:34:47,905 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_29_to_33_0 [2024-09-21 12:34:47,905 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_29_to_33_0 [2024-09-21 12:34:47,905 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-21 12:34:47,905 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-21 12:34:47,906 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-21 12:34:47,906 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-21 12:34:47,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-21 12:34:47,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-21 12:34:47,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-21 12:34:47,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-21 12:34:47,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-21 12:34:47,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-21 12:34:47,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-21 12:34:47,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-21 12:34:47,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-21 12:34:47,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-21 12:34:47,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-21 12:34:47,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-21 12:34:47,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-21 12:34:47,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-21 12:34:47,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-21 12:34:47,911 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_37_to_53_0 [2024-09-21 12:34:47,911 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_37_to_53_0 [2024-09-21 12:34:47,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-21 12:34:47,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-21 12:34:47,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-21 12:34:47,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-21 12:34:47,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-21 12:34:47,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-21 12:34:47,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-21 12:34:47,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-21 12:34:47,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-21 12:34:47,913 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-21 12:34:47,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-21 12:34:48,055 INFO L242 CfgBuilder]: Building ICFG [2024-09-21 12:34:48,057 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-21 12:34:48,439 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-21 12:34:48,439 INFO L291 CfgBuilder]: Performing block encoding [2024-09-21 12:34:48,459 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-21 12:34:48,459 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-21 12:34:48,460 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:34:48 BoogieIcfgContainer [2024-09-21 12:34:48,460 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-21 12:34:48,462 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-21 12:34:48,462 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-21 12:34:48,469 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-21 12:34:48,469 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:34:47" (1/3) ... [2024-09-21 12:34:48,470 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71f950b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:34:48, skipping insertion in model container [2024-09-21 12:34:48,470 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:47" (2/3) ... [2024-09-21 12:34:48,470 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71f950b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:34:48, skipping insertion in model container [2024-09-21 12:34:48,470 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:34:48" (3/3) ... [2024-09-21 12:34:48,471 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_dijkstra-u.c [2024-09-21 12:34:48,506 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-21 12:34:48,506 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-21 12:34:48,573 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-21 12:34:48,583 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;@46dcf630, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-21 12:34:48,584 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-21 12:34:48,589 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 33 states have internal predecessors, (38), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-21 12:34:48,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-21 12:34:48,597 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:34:48,598 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:34:48,598 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:34:48,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:34:48,604 INFO L85 PathProgramCache]: Analyzing trace with hash -795461761, now seen corresponding path program 1 times [2024-09-21 12:34:48,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:34:48,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466128353] [2024-09-21 12:34:48,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:34:48,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:34:48,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:48,835 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:34:48,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:48,855 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:34:48,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:48,881 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 12:34:48,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:48,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:34:48,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:34:48,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466128353] [2024-09-21 12:34:48,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466128353] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:34:48,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:34:48,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-21 12:34:48,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469289682] [2024-09-21 12:34:48,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:34:48,905 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-21 12:34:48,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:34:48,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-21 12:34:48,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-21 12:34:48,939 INFO L87 Difference]: Start difference. First operand has 54 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 33 states have internal predecessors, (38), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-21 12:34:49,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:34:49,182 INFO L93 Difference]: Finished difference Result 104 states and 150 transitions. [2024-09-21 12:34:49,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-21 12:34:49,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2024-09-21 12:34:49,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:34:49,193 INFO L225 Difference]: With dead ends: 104 [2024-09-21 12:34:49,193 INFO L226 Difference]: Without dead ends: 54 [2024-09-21 12:34:49,196 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-21 12:34:49,199 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 24 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 12:34:49,199 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 46 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 12:34:49,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-21 12:34:49,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2024-09-21 12:34:49,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-21 12:34:49,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2024-09-21 12:34:49,249 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 23 [2024-09-21 12:34:49,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:34:49,252 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2024-09-21 12:34:49,253 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-21 12:34:49,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:34:49,254 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2024-09-21 12:34:49,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-21 12:34:49,255 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:34:49,255 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:34:49,255 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-21 12:34:49,256 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:34:49,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:34:49,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1335693656, now seen corresponding path program 1 times [2024-09-21 12:34:49,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:34:49,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26986256] [2024-09-21 12:34:49,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:34:49,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:34:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:50,333 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:34:50,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:50,338 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:34:50,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:50,356 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 12:34:50,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:50,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:34:50,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:34:50,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26986256] [2024-09-21 12:34:50,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26986256] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:34:50,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:34:50,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-09-21 12:34:50,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929648909] [2024-09-21 12:34:50,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:34:50,549 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-21 12:34:50,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:34:50,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-21 12:34:50,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2024-09-21 12:34:50,551 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 14 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-21 12:34:51,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:34:51,582 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2024-09-21 12:34:51,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-21 12:34:51,582 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 24 [2024-09-21 12:34:51,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:34:51,584 INFO L225 Difference]: With dead ends: 83 [2024-09-21 12:34:51,585 INFO L226 Difference]: Without dead ends: 81 [2024-09-21 12:34:51,587 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2024-09-21 12:34:51,589 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 60 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-21 12:34:51,589 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 165 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-21 12:34:51,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-21 12:34:51,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2024-09-21 12:34:51,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 46 states have internal predecessors, (48), 23 states have call successors, (23), 8 states have call predecessors, (23), 9 states have return successors, (26), 21 states have call predecessors, (26), 21 states have call successors, (26) [2024-09-21 12:34:51,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2024-09-21 12:34:51,615 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 24 [2024-09-21 12:34:51,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:34:51,615 INFO L474 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2024-09-21 12:34:51,615 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-21 12:34:51,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:34:51,616 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2024-09-21 12:34:51,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-21 12:34:51,617 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:34:51,617 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:34:51,617 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-21 12:34:51,618 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:34:51,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:34:51,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1872287595, now seen corresponding path program 1 times [2024-09-21 12:34:51,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:34:51,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956193484] [2024-09-21 12:34:51,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:34:51,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:34:51,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:34:51,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [563125838] [2024-09-21 12:34:51,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:34:51,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:34:51,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:34:51,676 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) [2024-09-21 12:34:51,679 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-21 12:34:51,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:51,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-21 12:34:51,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:34:51,962 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 [2024-09-21 12:34:51,978 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 [2024-09-21 12:34:51,983 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 [2024-09-21 12:34:52,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:34:52,226 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 [2024-09-21 12:34:52,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-21 12:34:52,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:34:52,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:34:52,396 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 [2024-09-21 12:34:52,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:34:52,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956193484] [2024-09-21 12:34:52,481 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:34:52,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563125838] [2024-09-21 12:34:52,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563125838] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:34:52,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:34:52,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-09-21 12:34:52,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74067739] [2024-09-21 12:34:52,482 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:34:52,482 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-21 12:34:52,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:34:52,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-21 12:34:52,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-09-21 12:34:52,484 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-21 12:34:53,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:34:53,064 INFO L93 Difference]: Finished difference Result 122 states and 158 transitions. [2024-09-21 12:34:53,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-21 12:34:53,065 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2024-09-21 12:34:53,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:34:53,067 INFO L225 Difference]: With dead ends: 122 [2024-09-21 12:34:53,067 INFO L226 Difference]: Without dead ends: 120 [2024-09-21 12:34:53,067 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-09-21 12:34:53,068 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 47 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-21 12:34:53,070 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 231 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-21 12:34:53,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-09-21 12:34:53,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 111. [2024-09-21 12:34:53,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 64 states have (on average 1.125) internal successors, (72), 68 states have internal predecessors, (72), 33 states have call successors, (33), 11 states have call predecessors, (33), 13 states have return successors, (39), 31 states have call predecessors, (39), 30 states have call successors, (39) [2024-09-21 12:34:53,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 144 transitions. [2024-09-21 12:34:53,109 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 144 transitions. Word has length 30 [2024-09-21 12:34:53,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:34:53,110 INFO L474 AbstractCegarLoop]: Abstraction has 111 states and 144 transitions. [2024-09-21 12:34:53,110 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-21 12:34:53,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:34:53,112 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 144 transitions. [2024-09-21 12:34:53,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-21 12:34:53,113 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:34:53,113 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:34:53,122 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-21 12:34:53,314 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:34:53,314 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:34:53,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:34:53,315 INFO L85 PathProgramCache]: Analyzing trace with hash 687714431, now seen corresponding path program 1 times [2024-09-21 12:34:53,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:34:53,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965656633] [2024-09-21 12:34:53,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:34:53,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:34:53,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:54,121 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:34:54,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:54,124 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:34:54,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:54,139 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 12:34:54,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:54,532 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-21 12:34:54,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:54,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-21 12:34:54,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:34:54,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965656633] [2024-09-21 12:34:54,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965656633] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:34:54,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063651906] [2024-09-21 12:34:54,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:34:54,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:34:54,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:34:54,729 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) [2024-09-21 12:34:54,731 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-21 12:34:54,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:54,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-09-21 12:34:54,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:34:54,854 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 [2024-09-21 12:34:54,946 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 11 treesize of output 7 [2024-09-21 12:34:54,952 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 [2024-09-21 12:35:03,266 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 [2024-09-21 12:35:03,910 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:35:03,911 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 58 treesize of output 50 [2024-09-21 12:35:16,329 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:35:16,330 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 43 treesize of output 39 [2024-09-21 12:35:16,336 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 [2024-09-21 12:35:16,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:35:16,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:35:18,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063651906] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:35:18,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 12:35:18,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 34 [2024-09-21 12:35:18,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020813467] [2024-09-21 12:35:18,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 12:35:18,218 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-21 12:35:18,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:35:18,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-21 12:35:18,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1512, Unknown=5, NotChecked=0, Total=1640 [2024-09-21 12:35:18,220 INFO L87 Difference]: Start difference. First operand 111 states and 144 transitions. Second operand has 34 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 24 states have internal predecessors, (34), 10 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-21 12:35:23,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:35:23,377 INFO L93 Difference]: Finished difference Result 169 states and 221 transitions. [2024-09-21 12:35:23,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-21 12:35:23,378 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 24 states have internal predecessors, (34), 10 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 30 [2024-09-21 12:35:23,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:35:23,381 INFO L225 Difference]: With dead ends: 169 [2024-09-21 12:35:23,381 INFO L226 Difference]: Without dead ends: 167 [2024-09-21 12:35:23,383 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=381, Invalid=4170, Unknown=5, NotChecked=0, Total=4556 [2024-09-21 12:35:23,384 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 169 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 1943 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 2099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-09-21 12:35:23,385 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 382 Invalid, 2099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1943 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-09-21 12:35:23,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-09-21 12:35:23,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 108. [2024-09-21 12:35:23,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 63 states have (on average 1.126984126984127) internal successors, (71), 67 states have internal predecessors, (71), 32 states have call successors, (32), 11 states have call predecessors, (32), 12 states have return successors, (34), 30 states have call predecessors, (34), 29 states have call successors, (34) [2024-09-21 12:35:23,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 137 transitions. [2024-09-21 12:35:23,428 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 137 transitions. Word has length 30 [2024-09-21 12:35:23,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:35:23,428 INFO L474 AbstractCegarLoop]: Abstraction has 108 states and 137 transitions. [2024-09-21 12:35:23,429 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 24 states have internal predecessors, (34), 10 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-21 12:35:23,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:23,429 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 137 transitions. [2024-09-21 12:35:23,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-21 12:35:23,430 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:35:23,430 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, 1, 1] [2024-09-21 12:35:23,450 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-21 12:35:23,634 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:35:23,635 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:35:23,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:23,635 INFO L85 PathProgramCache]: Analyzing trace with hash -546904304, now seen corresponding path program 1 times [2024-09-21 12:35:23,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:35:23,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594665158] [2024-09-21 12:35:23,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:23,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:35:23,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:35:23,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [669149042] [2024-09-21 12:35:23,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:23,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:35:23,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:35:23,691 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) [2024-09-21 12:35:23,693 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-21 12:35:23,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:23,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-09-21 12:35:23,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:35:23,838 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 [2024-09-21 12:35:23,844 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 [2024-09-21 12:35:23,850 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 [2024-09-21 12:35:23,856 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 [2024-09-21 12:35:23,864 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 [2024-09-21 12:35:24,209 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 [2024-09-21 12:35:36,435 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 [2024-09-21 12:35:36,542 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:35:36,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:35:41,763 WARN L876 $PredicateComparison]: unable to prove that (forall ((|func_to_recursive_line_37_to_53_0_#t~mem24| Int) (|func_to_recursive_line_37_to_53_0_#t~mem33| Int) (|func_to_recursive_line_37_to_53_0_#t~mem23| Int) (|func_to_recursive_line_37_to_53_0_#t~mem21| Int) (|func_to_recursive_line_37_to_53_0_#t~mem30| Int) (|func_to_recursive_line_37_to_53_0_#t~mem19| Int) (|func_to_recursive_line_37_to_53_0_#t~mem18| Int)) (= (mod (let ((.cse2 (select (select |c_#memory_int#1| c_func_to_recursive_line_37_to_53_0_~p.base) c_func_to_recursive_line_37_to_53_0_~p.offset)) (.cse0 (select (select |c_#memory_int#3| c_func_to_recursive_line_37_to_53_0_~q.base) c_func_to_recursive_line_37_to_53_0_~q.offset)) (.cse1 (select (select |c_#memory_int#2| c_func_to_recursive_line_37_to_53_0_~h.base) c_func_to_recursive_line_37_to_53_0_~h.offset))) (+ (* |func_to_recursive_line_37_to_53_0_#t~mem30| .cse0 .cse1 12) (* .cse1 .cse1 .cse1) (* |func_to_recursive_line_37_to_53_0_#t~mem18| .cse1 (select (select |c_#memory_int#4| c_func_to_recursive_line_37_to_53_0_~n.base) c_func_to_recursive_line_37_to_53_0_~n.offset) 4294967284) (* 4294967292 .cse2 .cse0 .cse0) (* |func_to_recursive_line_37_to_53_0_#t~mem19| |func_to_recursive_line_37_to_53_0_#t~mem21| .cse2 16) (* |func_to_recursive_line_37_to_53_0_#t~mem33| .cse2 .cse0 4294967280) (* |func_to_recursive_line_37_to_53_0_#t~mem24| |func_to_recursive_line_37_to_53_0_#t~mem23| 4294967295 .cse1))) 4294967296) 0)) is different from true [2024-09-21 12:35:41,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:35:41,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594665158] [2024-09-21 12:35:41,804 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:35:41,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669149042] [2024-09-21 12:35:41,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669149042] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:35:41,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:35:41,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-09-21 12:35:41,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402760488] [2024-09-21 12:35:41,805 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:35:41,805 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-21 12:35:41,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:35:41,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-21 12:35:41,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=122, Unknown=3, NotChecked=22, Total=182 [2024-09-21 12:35:41,806 INFO L87 Difference]: Start difference. First operand 108 states and 137 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-21 12:35:42,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:35:42,860 INFO L93 Difference]: Finished difference Result 157 states and 194 transitions. [2024-09-21 12:35:42,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-21 12:35:42,860 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 36 [2024-09-21 12:35:42,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:35:42,863 INFO L225 Difference]: With dead ends: 157 [2024-09-21 12:35:42,863 INFO L226 Difference]: Without dead ends: 155 [2024-09-21 12:35:42,864 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=86, Invalid=257, Unknown=3, NotChecked=34, Total=380 [2024-09-21 12:35:42,867 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 48 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-21 12:35:42,867 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 259 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-21 12:35:42,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-09-21 12:35:42,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 153. [2024-09-21 12:35:42,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 92 states have (on average 1.1195652173913044) internal successors, (103), 96 states have internal predecessors, (103), 42 states have call successors, (42), 17 states have call predecessors, (42), 18 states have return successors, (46), 40 states have call predecessors, (46), 38 states have call successors, (46) [2024-09-21 12:35:42,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 191 transitions. [2024-09-21 12:35:42,947 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 191 transitions. Word has length 36 [2024-09-21 12:35:42,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:35:42,948 INFO L474 AbstractCegarLoop]: Abstraction has 153 states and 191 transitions. [2024-09-21 12:35:42,949 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-21 12:35:42,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:42,949 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 191 transitions. [2024-09-21 12:35:42,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-21 12:35:42,952 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:35:42,952 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, 1, 1] [2024-09-21 12:35:42,970 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-21 12:35:43,156 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:35:43,157 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:35:43,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:43,157 INFO L85 PathProgramCache]: Analyzing trace with hash 21325385, now seen corresponding path program 1 times [2024-09-21 12:35:43,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:35:43,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483341964] [2024-09-21 12:35:43,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:43,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:35:43,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:35:43,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1756868051] [2024-09-21 12:35:43,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:43,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:35:43,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:35:43,211 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) [2024-09-21 12:35:43,215 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-21 12:35:43,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:43,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-09-21 12:35:43,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:35:43,420 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 [2024-09-21 12:35:43,426 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 [2024-09-21 12:35:43,432 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 [2024-09-21 12:35:43,755 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 [2024-09-21 12:35:43,763 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 50 treesize of output 22 [2024-09-21 12:35:43,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 23 [2024-09-21 12:35:43,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2024-09-21 12:35:43,991 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-21 12:35:43,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:35:44,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 136 [2024-09-21 12:35:44,132 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 136 treesize of output 108 [2024-09-21 12:35:52,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:35:52,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483341964] [2024-09-21 12:35:52,654 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:35:52,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756868051] [2024-09-21 12:35:52,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756868051] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:35:52,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:35:52,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-09-21 12:35:52,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826377073] [2024-09-21 12:35:52,655 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:35:52,655 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-21 12:35:52,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:35:52,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-21 12:35:52,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=84, Unknown=2, NotChecked=0, Total=110 [2024-09-21 12:35:52,656 INFO L87 Difference]: Start difference. First operand 153 states and 191 transitions. Second operand has 9 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-21 12:35:53,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:35:53,520 INFO L93 Difference]: Finished difference Result 179 states and 216 transitions. [2024-09-21 12:35:53,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-21 12:35:53,525 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2024-09-21 12:35:53,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:35:53,527 INFO L225 Difference]: With dead ends: 179 [2024-09-21 12:35:53,527 INFO L226 Difference]: Without dead ends: 177 [2024-09-21 12:35:53,527 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 9 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=49, Invalid=159, Unknown=2, NotChecked=0, Total=210 [2024-09-21 12:35:53,528 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 28 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-21 12:35:53,528 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 249 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-21 12:35:53,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-09-21 12:35:53,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 175. [2024-09-21 12:35:53,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 107 states have (on average 1.1121495327102804) internal successors, (119), 111 states have internal predecessors, (119), 45 states have call successors, (45), 21 states have call predecessors, (45), 22 states have return successors, (48), 43 states have call predecessors, (48), 40 states have call successors, (48) [2024-09-21 12:35:53,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 212 transitions. [2024-09-21 12:35:53,617 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 212 transitions. Word has length 42 [2024-09-21 12:35:53,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:35:53,617 INFO L474 AbstractCegarLoop]: Abstraction has 175 states and 212 transitions. [2024-09-21 12:35:53,617 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-21 12:35:53,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:53,618 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 212 transitions. [2024-09-21 12:35:53,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-21 12:35:53,619 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:35:53,619 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:35:53,639 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-21 12:35:53,819 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:35:53,819 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:35:53,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:53,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1606878135, now seen corresponding path program 1 times [2024-09-21 12:35:53,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:35:53,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125954182] [2024-09-21 12:35:53,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:53,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:35:53,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:35:53,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1054208966] [2024-09-21 12:35:53,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:53,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:35:53,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:35:53,851 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) [2024-09-21 12:35:53,858 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-21 12:35:53,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:53,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 113 conjuncts are in the unsatisfiable core [2024-09-21 12:35:54,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:35:54,013 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 [2024-09-21 12:35:54,019 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 [2024-09-21 12:35:54,023 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 [2024-09-21 12:35:54,030 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 [2024-09-21 12:35:54,036 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 [2024-09-21 12:35:54,229 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 [2024-09-21 12:35:54,639 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:35:54,639 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 23 treesize of output 27 [2024-09-21 12:36:06,888 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 [2024-09-21 12:36:06,991 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 4 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-21 12:36:06,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:36:46,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:36:46,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125954182] [2024-09-21 12:36:46,964 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:36:46,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054208966] [2024-09-21 12:36:46,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054208966] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:36:46,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:36:46,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-21 12:36:46,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916162521] [2024-09-21 12:36:46,965 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:36:46,965 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-21 12:36:46,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:36:46,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-21 12:36:46,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=219, Unknown=9, NotChecked=0, Total=272 [2024-09-21 12:36:46,967 INFO L87 Difference]: Start difference. First operand 175 states and 212 transitions. Second operand has 15 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-21 12:36:48,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:36:48,852 INFO L93 Difference]: Finished difference Result 233 states and 276 transitions. [2024-09-21 12:36:48,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-21 12:36:48,853 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 42 [2024-09-21 12:36:48,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:36:48,855 INFO L225 Difference]: With dead ends: 233 [2024-09-21 12:36:48,858 INFO L226 Difference]: Without dead ends: 231 [2024-09-21 12:36:48,859 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 52.7s TimeCoverageRelationStatistics Valid=97, Invalid=400, Unknown=9, NotChecked=0, Total=506 [2024-09-21 12:36:48,860 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 46 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 35 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-21 12:36:48,860 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 327 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 781 Invalid, 20 Unknown, 0 Unchecked, 1.3s Time] [2024-09-21 12:36:48,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-09-21 12:36:48,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 227. [2024-09-21 12:36:48,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 140 states have (on average 1.1071428571428572) internal successors, (155), 144 states have internal predecessors, (155), 55 states have call successors, (55), 28 states have call predecessors, (55), 31 states have return successors, (62), 54 states have call predecessors, (62), 49 states have call successors, (62) [2024-09-21 12:36:48,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 272 transitions. [2024-09-21 12:36:48,976 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 272 transitions. Word has length 42 [2024-09-21 12:36:48,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:36:48,977 INFO L474 AbstractCegarLoop]: Abstraction has 227 states and 272 transitions. [2024-09-21 12:36:48,977 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-21 12:36:48,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:36:48,977 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 272 transitions. [2024-09-21 12:36:48,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-21 12:36:48,979 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:36:48,979 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:36:48,995 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-21 12:36:49,182 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-21 12:36:49,183 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:36:49,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:36:49,183 INFO L85 PathProgramCache]: Analyzing trace with hash 964440670, now seen corresponding path program 2 times [2024-09-21 12:36:49,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:36:49,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984406309] [2024-09-21 12:36:49,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:36:49,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:36:49,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:36:49,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [451163432] [2024-09-21 12:36:49,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 12:36:49,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:36:49,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:36:49,216 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) [2024-09-21 12:36:49,226 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-21 12:36:49,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 12:36:49,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:36:49,439 WARN L260 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 192 conjuncts are in the unsatisfiable core [2024-09-21 12:36:49,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:36:49,460 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 [2024-09-21 12:36:49,535 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 [2024-09-21 12:36:49,552 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 [2024-09-21 12:36:49,568 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 [2024-09-21 12:36:49,577 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 [2024-09-21 12:36:49,925 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 15 treesize of output 11 [2024-09-21 12:36:50,037 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 11 [2024-09-21 12:36:50,758 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 [2024-09-21 12:36:51,628 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:36:51,628 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 30 treesize of output 30 [2024-09-21 12:36:56,163 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:36:56,164 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 72 treesize of output 68 [2024-09-21 12:36:56,579 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-21 12:36:56,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:37:56,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:37:56,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984406309] [2024-09-21 12:37:56,343 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:37:56,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451163432] [2024-09-21 12:37:56,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451163432] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:37:56,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:37:56,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-09-21 12:37:56,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504790911] [2024-09-21 12:37:56,344 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:37:56,344 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-21 12:37:56,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:37:56,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-21 12:37:56,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=834, Unknown=9, NotChecked=0, Total=930 [2024-09-21 12:37:56,345 INFO L87 Difference]: Start difference. First operand 227 states and 272 transitions. Second operand has 27 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 8 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-21 12:38:03,478 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] [2024-09-21 12:38:04,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-21 12:38:09,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-21 12:38:13,725 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] [2024-09-21 12:38:14,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:38:14,169 INFO L93 Difference]: Finished difference Result 279 states and 330 transitions. [2024-09-21 12:38:14,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-21 12:38:14,170 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 8 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 48 [2024-09-21 12:38:14,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:38:14,172 INFO L225 Difference]: With dead ends: 279 [2024-09-21 12:38:14,172 INFO L226 Difference]: Without dead ends: 277 [2024-09-21 12:38:14,173 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 66.7s TimeCoverageRelationStatistics Valid=190, Invalid=1607, Unknown=9, NotChecked=0, Total=1806 [2024-09-21 12:38:14,173 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 65 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 1637 mSolverCounterSat, 48 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 1696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1637 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:38:14,174 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 446 Invalid, 1696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1637 Invalid, 11 Unknown, 0 Unchecked, 16.1s Time] [2024-09-21 12:38:14,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2024-09-21 12:38:14,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 229. [2024-09-21 12:38:14,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 141 states have (on average 1.1063829787234043) internal successors, (156), 145 states have internal predecessors, (156), 55 states have call successors, (55), 28 states have call predecessors, (55), 32 states have return successors, (64), 55 states have call predecessors, (64), 49 states have call successors, (64) [2024-09-21 12:38:14,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 275 transitions. [2024-09-21 12:38:14,289 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 275 transitions. Word has length 48 [2024-09-21 12:38:14,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:38:14,289 INFO L474 AbstractCegarLoop]: Abstraction has 229 states and 275 transitions. [2024-09-21 12:38:14,290 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 8 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-21 12:38:14,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:14,290 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 275 transitions. [2024-09-21 12:38:14,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-21 12:38:14,291 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:38:14,293 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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] [2024-09-21 12:38:14,308 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-21 12:38:14,494 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:38:14,494 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:38:14,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:14,495 INFO L85 PathProgramCache]: Analyzing trace with hash 71508741, now seen corresponding path program 3 times [2024-09-21 12:38:14,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:38:14,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126108995] [2024-09-21 12:38:14,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:14,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:38:14,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:38:14,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1388286486] [2024-09-21 12:38:14,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 12:38:14,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:38:14,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:38:14,544 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) [2024-09-21 12:38:14,545 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-21 12:38:14,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-21 12:38:14,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:38:14,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-09-21 12:38:14,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:38:14,780 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 [2024-09-21 12:38:14,804 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 [2024-09-21 12:38:14,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 12:38:14,818 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 [2024-09-21 12:38:15,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-09-21 12:38:15,390 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 [2024-09-21 12:38:15,401 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 [2024-09-21 12:38:15,480 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-09-21 12:38:15,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:38:15,603 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 87 treesize of output 83 [2024-09-21 12:38:19,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:38:19,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126108995] [2024-09-21 12:38:19,761 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:38:19,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388286486] [2024-09-21 12:38:19,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388286486] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:38:19,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:38:19,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-09-21 12:38:19,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262696121] [2024-09-21 12:38:19,761 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:38:19,762 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-21 12:38:19,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:38:19,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-21 12:38:19,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=148, Unknown=1, NotChecked=0, Total=182 [2024-09-21 12:38:19,762 INFO L87 Difference]: Start difference. First operand 229 states and 275 transitions. Second operand has 10 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-21 12:38:20,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:38:20,486 INFO L93 Difference]: Finished difference Result 237 states and 281 transitions. [2024-09-21 12:38:20,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-21 12:38:20,487 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 54 [2024-09-21 12:38:20,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:38:20,489 INFO L225 Difference]: With dead ends: 237 [2024-09-21 12:38:20,489 INFO L226 Difference]: Without dead ends: 235 [2024-09-21 12:38:20,489 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=61, Invalid=244, Unknown=1, NotChecked=0, Total=306 [2024-09-21 12:38:20,490 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-21 12:38:20,490 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 299 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-21 12:38:20,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2024-09-21 12:38:20,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 185. [2024-09-21 12:38:20,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 114 states have (on average 1.1140350877192982) internal successors, (127), 118 states have internal predecessors, (127), 45 states have call successors, (45), 23 states have call predecessors, (45), 25 states have return successors, (49), 43 states have call predecessors, (49), 40 states have call successors, (49) [2024-09-21 12:38:20,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 221 transitions. [2024-09-21 12:38:20,587 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 221 transitions. Word has length 54 [2024-09-21 12:38:20,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:38:20,587 INFO L474 AbstractCegarLoop]: Abstraction has 185 states and 221 transitions. [2024-09-21 12:38:20,587 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-21 12:38:20,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:20,588 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 221 transitions. [2024-09-21 12:38:20,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-21 12:38:20,588 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:38:20,589 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, 1, 1] [2024-09-21 12:38:20,607 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-21 12:38:20,789 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:38:20,790 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:38:20,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:20,790 INFO L85 PathProgramCache]: Analyzing trace with hash -959275072, now seen corresponding path program 1 times [2024-09-21 12:38:20,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:38:20,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824230224] [2024-09-21 12:38:20,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:20,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:38:20,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:38:20,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [529372964] [2024-09-21 12:38:20,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:20,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:38:20,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:38:20,823 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) [2024-09-21 12:38:20,825 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-21 12:38:20,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:20,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 106 conjuncts are in the unsatisfiable core [2024-09-21 12:38:20,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:38:20,997 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 [2024-09-21 12:38:21,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:38:21,007 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 [2024-09-21 12:38:21,011 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 [2024-09-21 12:38:21,016 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 [2024-09-21 12:38:21,577 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 36 treesize of output 16 [2024-09-21 12:38:21,594 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 [2024-09-21 12:38:21,598 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 [2024-09-21 12:38:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-21 12:38:21,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:38:22,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:38:22,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824230224] [2024-09-21 12:38:22,025 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:38:22,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529372964] [2024-09-21 12:38:22,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529372964] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:38:22,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:38:22,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-09-21 12:38:22,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005118613] [2024-09-21 12:38:22,025 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:38:22,026 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-21 12:38:22,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:38:22,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-21 12:38:22,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-09-21 12:38:22,027 INFO L87 Difference]: Start difference. First operand 185 states and 221 transitions. Second operand has 10 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-21 12:38:23,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:38:23,054 INFO L93 Difference]: Finished difference Result 193 states and 227 transitions. [2024-09-21 12:38:23,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-21 12:38:23,055 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2024-09-21 12:38:23,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:38:23,057 INFO L225 Difference]: With dead ends: 193 [2024-09-21 12:38:23,057 INFO L226 Difference]: Without dead ends: 191 [2024-09-21 12:38:23,057 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 10 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-09-21 12:38:23,058 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 78 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-21 12:38:23,058 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 191 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-21 12:38:23,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-09-21 12:38:23,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 189. [2024-09-21 12:38:23,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 117 states have (on average 1.1111111111111112) internal successors, (130), 121 states have internal predecessors, (130), 45 states have call successors, (45), 24 states have call predecessors, (45), 26 states have return successors, (49), 43 states have call predecessors, (49), 40 states have call successors, (49) [2024-09-21 12:38:23,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 224 transitions. [2024-09-21 12:38:23,190 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 224 transitions. Word has length 48 [2024-09-21 12:38:23,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:38:23,191 INFO L474 AbstractCegarLoop]: Abstraction has 189 states and 224 transitions. [2024-09-21 12:38:23,191 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-21 12:38:23,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:23,191 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 224 transitions. [2024-09-21 12:38:23,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-21 12:38:23,192 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:38:23,192 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, 1] [2024-09-21 12:38:23,212 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-21 12:38:23,393 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:38:23,393 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:38:23,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:23,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1281191157, now seen corresponding path program 1 times [2024-09-21 12:38:23,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:38:23,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504665646] [2024-09-21 12:38:23,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:23,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:38:23,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:38:23,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [547335789] [2024-09-21 12:38:23,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:23,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:38:23,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:38:23,433 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) [2024-09-21 12:38:23,435 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-21 12:38:23,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:23,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-21 12:38:23,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:38:23,587 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 [2024-09-21 12:38:23,590 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 [2024-09-21 12:38:23,594 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 [2024-09-21 12:38:23,907 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 [2024-09-21 12:38:23,912 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 [2024-09-21 12:38:23,914 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 [2024-09-21 12:38:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-21 12:38:23,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:38:24,048 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 [2024-09-21 12:38:24,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:38:24,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504665646] [2024-09-21 12:38:24,106 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:38:24,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547335789] [2024-09-21 12:38:24,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547335789] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:38:24,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:38:24,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-09-21 12:38:24,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744563731] [2024-09-21 12:38:24,106 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:38:24,107 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-21 12:38:24,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:38:24,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-21 12:38:24,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-09-21 12:38:24,107 INFO L87 Difference]: Start difference. First operand 189 states and 224 transitions. Second operand has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-21 12:38:24,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:38:24,687 INFO L93 Difference]: Finished difference Result 203 states and 238 transitions. [2024-09-21 12:38:24,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-21 12:38:24,688 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 54 [2024-09-21 12:38:24,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:38:24,689 INFO L225 Difference]: With dead ends: 203 [2024-09-21 12:38:24,689 INFO L226 Difference]: Without dead ends: 201 [2024-09-21 12:38:24,690 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 13 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-09-21 12:38:24,690 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 43 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-21 12:38:24,690 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 247 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-21 12:38:24,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-21 12:38:24,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 197. [2024-09-21 12:38:24,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 123 states have (on average 1.0975609756097562) internal successors, (135), 127 states have internal predecessors, (135), 45 states have call successors, (45), 26 states have call predecessors, (45), 28 states have return successors, (49), 43 states have call predecessors, (49), 40 states have call successors, (49) [2024-09-21 12:38:24,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 229 transitions. [2024-09-21 12:38:24,793 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 229 transitions. Word has length 54 [2024-09-21 12:38:24,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:38:24,793 INFO L474 AbstractCegarLoop]: Abstraction has 197 states and 229 transitions. [2024-09-21 12:38:24,793 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-21 12:38:24,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:24,794 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 229 transitions. [2024-09-21 12:38:24,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-21 12:38:24,794 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:38:24,794 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:38:24,813 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-21 12:38:24,995 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-21 12:38:24,996 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:38:24,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:24,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1553860121, now seen corresponding path program 1 times [2024-09-21 12:38:24,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:38:24,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974231625] [2024-09-21 12:38:24,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:24,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:38:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:38:25,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1160692639] [2024-09-21 12:38:25,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:25,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:38:25,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:38:25,039 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) [2024-09-21 12:38:25,041 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-21 12:38:25,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:25,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-09-21 12:38:25,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:38:25,252 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 [2024-09-21 12:38:25,259 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 11 treesize of output 7 [2024-09-21 12:38:25,264 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 [2024-09-21 12:38:25,271 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 [2024-09-21 12:38:25,634 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 13 [2024-09-21 12:38:25,658 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 [2024-09-21 12:38:25,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-21 12:38:25,746 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-21 12:38:25,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:38:33,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:38:33,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974231625] [2024-09-21 12:38:33,995 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:38:33,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160692639] [2024-09-21 12:38:33,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160692639] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:38:33,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:38:33,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-09-21 12:38:33,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616009854] [2024-09-21 12:38:33,996 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:38:33,997 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-21 12:38:33,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:38:33,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-21 12:38:33,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=85, Unknown=1, NotChecked=0, Total=110 [2024-09-21 12:38:33,997 INFO L87 Difference]: Start difference. First operand 197 states and 229 transitions. Second operand has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-21 12:38:34,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:38:34,490 INFO L93 Difference]: Finished difference Result 205 states and 235 transitions. [2024-09-21 12:38:34,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-21 12:38:34,491 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 54 [2024-09-21 12:38:34,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:38:34,492 INFO L225 Difference]: With dead ends: 205 [2024-09-21 12:38:34,492 INFO L226 Difference]: Without dead ends: 203 [2024-09-21 12:38:34,492 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 11 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=49, Invalid=160, Unknown=1, NotChecked=0, Total=210 [2024-09-21 12:38:34,493 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-21 12:38:34,493 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 250 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-21 12:38:34,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-09-21 12:38:34,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 149. [2024-09-21 12:38:34,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 92 states have (on average 1.108695652173913) internal successors, (102), 96 states have internal predecessors, (102), 35 states have call successors, (35), 19 states have call predecessors, (35), 21 states have return successors, (38), 33 states have call predecessors, (38), 31 states have call successors, (38) [2024-09-21 12:38:34,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 175 transitions. [2024-09-21 12:38:34,580 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 175 transitions. Word has length 54 [2024-09-21 12:38:34,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:38:34,580 INFO L474 AbstractCegarLoop]: Abstraction has 149 states and 175 transitions. [2024-09-21 12:38:34,580 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-21 12:38:34,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:34,581 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 175 transitions. [2024-09-21 12:38:34,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-21 12:38:34,581 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:38:34,581 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, 1, 1, 1] [2024-09-21 12:38:34,601 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-21 12:38:34,782 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-21 12:38:34,782 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:38:34,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:34,783 INFO L85 PathProgramCache]: Analyzing trace with hash 541315051, now seen corresponding path program 1 times [2024-09-21 12:38:34,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:38:34,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850925962] [2024-09-21 12:38:34,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:34,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:38:34,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:35,158 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:38:35,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:35,161 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:38:35,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:35,173 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 12:38:35,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:35,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-21 12:38:35,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:35,188 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-21 12:38:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:35,191 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-21 12:38:35,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:35,196 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-21 12:38:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:35,201 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-21 12:38:35,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:35,204 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-21 12:38:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:35,208 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-21 12:38:35,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:38:35,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850925962] [2024-09-21 12:38:35,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850925962] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:38:35,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:38:35,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-21 12:38:35,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342687735] [2024-09-21 12:38:35,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:38:35,209 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-21 12:38:35,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:38:35,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-21 12:38:35,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-21 12:38:35,210 INFO L87 Difference]: Start difference. First operand 149 states and 175 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-21 12:38:35,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:38:35,715 INFO L93 Difference]: Finished difference Result 245 states and 300 transitions. [2024-09-21 12:38:35,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-21 12:38:35,716 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 65 [2024-09-21 12:38:35,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:38:35,717 INFO L225 Difference]: With dead ends: 245 [2024-09-21 12:38:35,717 INFO L226 Difference]: Without dead ends: 173 [2024-09-21 12:38:35,718 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-09-21 12:38:35,719 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 46 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-21 12:38:35,719 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 102 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-21 12:38:35,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-09-21 12:38:35,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 167. [2024-09-21 12:38:35,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 102 states have (on average 1.0980392156862746) internal successors, (112), 106 states have internal predecessors, (112), 42 states have call successors, (42), 20 states have call predecessors, (42), 22 states have return successors, (45), 40 states have call predecessors, (45), 38 states have call successors, (45) [2024-09-21 12:38:35,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 199 transitions. [2024-09-21 12:38:35,822 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 199 transitions. Word has length 65 [2024-09-21 12:38:35,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:38:35,822 INFO L474 AbstractCegarLoop]: Abstraction has 167 states and 199 transitions. [2024-09-21 12:38:35,822 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-21 12:38:35,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:35,822 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 199 transitions. [2024-09-21 12:38:35,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-21 12:38:35,823 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:38:35,823 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:38:35,823 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-09-21 12:38:35,823 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:38:35,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:35,824 INFO L85 PathProgramCache]: Analyzing trace with hash -993555947, now seen corresponding path program 1 times [2024-09-21 12:38:35,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:38:35,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216468931] [2024-09-21 12:38:35,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:35,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:38:35,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:38:35,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1016298819] [2024-09-21 12:38:35,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:35,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:38:35,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:38:35,862 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) [2024-09-21 12:38:35,864 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-21 12:38:36,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:36,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-21 12:38:36,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:38:36,090 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 [2024-09-21 12:38:36,094 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 [2024-09-21 12:38:36,103 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 [2024-09-21 12:38:36,189 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 [2024-09-21 12:38:36,355 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 19 treesize of output 11 [2024-09-21 12:38:36,360 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 [2024-09-21 12:38:36,441 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-21 12:38:36,442 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 12:38:36,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:38:36,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216468931] [2024-09-21 12:38:36,442 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:38:36,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016298819] [2024-09-21 12:38:36,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016298819] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:38:36,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:38:36,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-21 12:38:36,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132826105] [2024-09-21 12:38:36,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:38:36,443 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-21 12:38:36,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:38:36,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-21 12:38:36,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-21 12:38:36,444 INFO L87 Difference]: Start difference. First operand 167 states and 199 transitions. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-09-21 12:38:37,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:38:37,136 INFO L93 Difference]: Finished difference Result 175 states and 205 transitions. [2024-09-21 12:38:37,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-21 12:38:37,136 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 64 [2024-09-21 12:38:37,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:38:37,137 INFO L225 Difference]: With dead ends: 175 [2024-09-21 12:38:37,137 INFO L226 Difference]: Without dead ends: 173 [2024-09-21 12:38:37,138 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-09-21 12:38:37,138 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 63 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 52 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-21 12:38:37,138 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 98 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 300 Invalid, 2 Unknown, 0 Unchecked, 0.4s Time] [2024-09-21 12:38:37,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-09-21 12:38:37,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2024-09-21 12:38:37,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 105 states have (on average 1.0952380952380953) internal successors, (115), 109 states have internal predecessors, (115), 42 states have call successors, (42), 21 states have call predecessors, (42), 23 states have return successors, (45), 40 states have call predecessors, (45), 38 states have call successors, (45) [2024-09-21 12:38:37,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 202 transitions. [2024-09-21 12:38:37,280 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 202 transitions. Word has length 64 [2024-09-21 12:38:37,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:38:37,281 INFO L474 AbstractCegarLoop]: Abstraction has 171 states and 202 transitions. [2024-09-21 12:38:37,281 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-09-21 12:38:37,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:37,281 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 202 transitions. [2024-09-21 12:38:37,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-21 12:38:37,282 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:38:37,282 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:38:37,300 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-21 12:38:37,482 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-21 12:38:37,483 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:38:37,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:37,483 INFO L85 PathProgramCache]: Analyzing trace with hash -319385837, now seen corresponding path program 1 times [2024-09-21 12:38:37,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:38:37,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969171481] [2024-09-21 12:38:37,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:37,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:38:37,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:38:37,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1171001926] [2024-09-21 12:38:37,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:37,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:38:37,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:38:37,518 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) [2024-09-21 12:38:37,520 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-21 12:38:37,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:37,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-21 12:38:37,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:38:37,695 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 [2024-09-21 12:38:37,699 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 [2024-09-21 12:38:37,746 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 [2024-09-21 12:38:37,848 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 [2024-09-21 12:38:37,851 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 15 treesize of output 7 [2024-09-21 12:38:37,882 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-21 12:38:37,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:38:38,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:38:38,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969171481] [2024-09-21 12:38:38,010 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:38:38,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171001926] [2024-09-21 12:38:38,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171001926] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:38:38,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:38:38,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-21 12:38:38,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47752020] [2024-09-21 12:38:38,011 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:38:38,011 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-21 12:38:38,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:38:38,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-21 12:38:38,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-09-21 12:38:38,012 INFO L87 Difference]: Start difference. First operand 171 states and 202 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-21 12:38:38,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:38:38,744 INFO L93 Difference]: Finished difference Result 179 states and 208 transitions. [2024-09-21 12:38:38,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-21 12:38:38,744 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2024-09-21 12:38:38,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:38:38,746 INFO L225 Difference]: With dead ends: 179 [2024-09-21 12:38:38,746 INFO L226 Difference]: Without dead ends: 175 [2024-09-21 12:38:38,746 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-09-21 12:38:38,747 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 49 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-21 12:38:38,747 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 101 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-21 12:38:38,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-09-21 12:38:38,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2024-09-21 12:38:38,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 107 states have (on average 1.0841121495327102) internal successors, (116), 110 states have internal predecessors, (116), 42 states have call successors, (42), 22 states have call predecessors, (42), 23 states have return successors, (45), 40 states have call predecessors, (45), 38 states have call successors, (45) [2024-09-21 12:38:38,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 203 transitions. [2024-09-21 12:38:38,875 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 203 transitions. Word has length 70 [2024-09-21 12:38:38,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:38:38,876 INFO L474 AbstractCegarLoop]: Abstraction has 173 states and 203 transitions. [2024-09-21 12:38:38,876 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-21 12:38:38,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:38,876 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 203 transitions. [2024-09-21 12:38:38,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-21 12:38:38,877 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:38:38,877 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, 1, 1, 1, 1, 1, 1] [2024-09-21 12:38:38,891 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-21 12:38:39,077 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-21 12:38:39,078 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:38:39,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:39,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1330456740, now seen corresponding path program 1 times [2024-09-21 12:38:39,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:38:39,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587368937] [2024-09-21 12:38:39,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:39,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:38:39,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:41,722 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:38:41,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:41,724 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:38:41,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:41,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 12:38:41,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:42,285 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-21 12:38:42,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:42,531 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-21 12:38:42,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:42,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-21 12:38:42,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:42,596 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-21 12:38:42,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:42,603 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-21 12:38:42,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:42,612 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-21 12:38:42,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:42,620 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-21 12:38:42,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:42,626 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-09-21 12:38:42,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:38:42,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587368937] [2024-09-21 12:38:42,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587368937] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:38:42,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780500680] [2024-09-21 12:38:42,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:42,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:38:42,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:38:42,629 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) [2024-09-21 12:38:42,630 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-21 12:38:42,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:42,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 160 conjuncts are in the unsatisfiable core [2024-09-21 12:38:42,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:38:42,901 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 [2024-09-21 12:38:42,906 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 [2024-09-21 12:38:42,911 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 [2024-09-21 12:38:42,918 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 [2024-09-21 12:38:43,422 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 11 [2024-09-21 12:38:43,876 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 [2024-09-21 12:38:43,887 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:38:43,887 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 41 treesize of output 37 [2024-09-21 12:38:48,148 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 [2024-09-21 12:38:48,155 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 95 treesize of output 63 [2024-09-21 12:38:48,793 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 [2024-09-21 12:38:48,994 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 [2024-09-21 12:38:49,010 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 90 treesize of output 72 [2024-09-21 12:38:49,025 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 92 treesize of output 80 [2024-09-21 12:38:49,682 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 179 treesize of output 143 [2024-09-21 12:38:49,689 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 [2024-09-21 12:38:49,702 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 62 treesize of output 50