./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.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 6908dde5 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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_hard2.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 8571897e57404ad6e85df2c29745d5b56fa4d168673d3bc7c670c79b03a6c106 --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-6908dde-m [2024-09-25 00:18:03,012 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 00:18:03,084 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-25 00:18:03,091 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 00:18:03,093 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 00:18:03,124 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 00:18:03,125 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 00:18:03,126 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 00:18:03,127 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 00:18:03,129 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 00:18:03,129 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 00:18:03,129 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 00:18:03,130 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 00:18:03,132 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 00:18:03,132 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 00:18:03,133 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 00:18:03,133 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 00:18:03,133 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 00:18:03,134 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-25 00:18:03,134 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 00:18:03,134 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 00:18:03,135 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 00:18:03,135 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 00:18:03,135 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 00:18:03,136 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 00:18:03,136 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 00:18:03,136 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 00:18:03,137 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 00:18:03,137 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 00:18:03,137 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 00:18:03,138 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 00:18:03,138 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 00:18:03,138 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 00:18:03,139 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 00:18:03,139 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 00:18:03,139 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 00:18:03,139 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-25 00:18:03,140 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-25 00:18:03,140 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 00:18:03,140 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 00:18:03,140 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 00:18:03,142 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 00:18:03,142 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8571897e57404ad6e85df2c29745d5b56fa4d168673d3bc7c670c79b03a6c106 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-25 00:18:03,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 00:18:03,431 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 00:18:03,434 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 00:18:03,435 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 00:18:03,436 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 00:18:03,437 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.c [2024-09-25 00:18:04,925 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 00:18:05,134 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 00:18:05,135 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.c [2024-09-25 00:18:05,143 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/b0009baa8/992167387ffa4a248d135ce0740cafef/FLAG5eef746a7 [2024-09-25 00:18:05,508 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/b0009baa8/992167387ffa4a248d135ce0740cafef [2024-09-25 00:18:05,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 00:18:05,513 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 00:18:05,517 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 00:18:05,517 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 00:18:05,523 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 00:18:05,524 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:18:05" (1/1) ... [2024-09-25 00:18:05,525 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b55a6bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:05, skipping insertion in model container [2024-09-25 00:18:05,525 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:18:05" (1/1) ... [2024-09-25 00:18:05,547 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 00:18:05,716 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_hard2.c[1067,1080] [2024-09-25 00:18:05,743 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 00:18:05,755 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 00:18:05,766 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_hard2.c[1067,1080] [2024-09-25 00:18:05,778 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 00:18:05,795 INFO L204 MainTranslator]: Completed translation [2024-09-25 00:18:05,795 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:05 WrapperNode [2024-09-25 00:18:05,795 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 00:18:05,796 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 00:18:05,797 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 00:18:05,797 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 00:18:05,805 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:05" (1/1) ... [2024-09-25 00:18:05,812 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:05" (1/1) ... [2024-09-25 00:18:05,821 INFO L138 Inliner]: procedures = 17, calls = 90, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 00:18:05,821 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 00:18:05,822 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 00:18:05,822 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 00:18:05,822 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 00:18:05,851 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:05" (1/1) ... [2024-09-25 00:18:05,852 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:05" (1/1) ... [2024-09-25 00:18:05,855 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:05" (1/1) ... [2024-09-25 00:18:05,873 INFO L175 MemorySlicer]: Split 56 memory accesses to 8 slices as follows [2, 8, 6, 8, 5, 6, 9, 12]. 21 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0, 0, 0, 0, 0]. The 12 writes are split as follows [0, 0, 1, 2, 1, 2, 3, 3]. [2024-09-25 00:18:05,874 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:05" (1/1) ... [2024-09-25 00:18:05,874 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:05" (1/1) ... [2024-09-25 00:18:05,892 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:05" (1/1) ... [2024-09-25 00:18:05,905 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:05" (1/1) ... [2024-09-25 00:18:05,907 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:05" (1/1) ... [2024-09-25 00:18:05,909 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:05" (1/1) ... [2024-09-25 00:18:05,912 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 00:18:05,913 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 00:18:05,913 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 00:18:05,913 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 00:18:05,914 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:05" (1/1) ... [2024-09-25 00:18:05,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 00:18:05,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:18:05,947 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) [2024-09-25 00:18:05,950 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 [2024-09-25 00:18:05,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 00:18:05,991 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_40_to_50_0 [2024-09-25 00:18:05,991 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_40_to_50_0 [2024-09-25 00:18:05,991 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 00:18:05,991 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 00:18:05,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-25 00:18:05,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-25 00:18:05,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-25 00:18:05,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-25 00:18:05,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-25 00:18:05,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-25 00:18:05,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-25 00:18:05,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-09-25 00:18:05,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-25 00:18:05,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-25 00:18:05,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-25 00:18:05,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-25 00:18:05,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-25 00:18:05,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-25 00:18:05,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-25 00:18:05,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-25 00:18:05,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-09-25 00:18:05,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 00:18:05,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 00:18:05,996 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_30_to_37_0 [2024-09-25 00:18:05,996 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_30_to_37_0 [2024-09-25 00:18:05,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 00:18:05,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 00:18:05,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-25 00:18:05,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-25 00:18:05,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-25 00:18:05,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-25 00:18:05,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-25 00:18:05,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-25 00:18:05,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-25 00:18:05,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-09-25 00:18:05,997 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-25 00:18:05,997 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-25 00:18:05,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-25 00:18:06,102 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 00:18:06,104 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 00:18:06,371 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-25 00:18:06,371 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 00:18:06,405 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 00:18:06,406 INFO L317 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-25 00:18:06,406 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:18:06 BoogieIcfgContainer [2024-09-25 00:18:06,406 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 00:18:06,410 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 00:18:06,411 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 00:18:06,414 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 00:18:06,414 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:18:05" (1/3) ... [2024-09-25 00:18:06,415 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2808fd45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:18:06, skipping insertion in model container [2024-09-25 00:18:06,416 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:05" (2/3) ... [2024-09-25 00:18:06,416 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2808fd45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:18:06, skipping insertion in model container [2024-09-25 00:18:06,416 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:18:06" (3/3) ... [2024-09-25 00:18:06,418 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_hard2.c [2024-09-25 00:18:06,440 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 00:18:06,440 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-25 00:18:06,492 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 00:18:06,499 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;@cf5a691, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 00:18:06,499 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-25 00:18:06,504 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 27 states have internal predecessors, (31), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-25 00:18:06,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-25 00:18:06,513 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:18:06,513 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:18:06,514 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:18:06,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:06,520 INFO L85 PathProgramCache]: Analyzing trace with hash -237389290, now seen corresponding path program 1 times [2024-09-25 00:18:06,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:18:06,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836766687] [2024-09-25 00:18:06,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:18:06,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:18:06,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:07,227 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:18:07,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:07,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 00:18:07,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:18:07,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836766687] [2024-09-25 00:18:07,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836766687] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 00:18:07,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 00:18:07,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-25 00:18:07,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654724930] [2024-09-25 00:18:07,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 00:18:07,256 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-25 00:18:07,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:18:07,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-25 00:18:07,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-25 00:18:07,328 INFO L87 Difference]: Start difference. First operand has 44 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 27 states have internal predecessors, (31), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 00:18:07,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:18:07,591 INFO L93 Difference]: Finished difference Result 86 states and 122 transitions. [2024-09-25 00:18:07,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-25 00:18:07,594 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-09-25 00:18:07,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:18:07,605 INFO L225 Difference]: With dead ends: 86 [2024-09-25 00:18:07,605 INFO L226 Difference]: Without dead ends: 44 [2024-09-25 00:18:07,612 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-25 00:18:07,617 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 18 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 00:18:07,618 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 255 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 00:18:07,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-09-25 00:18:07,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-09-25 00:18:07,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 25 states have (on average 1.16) internal successors, (29), 28 states have internal predecessors, (29), 13 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-25 00:18:07,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2024-09-25 00:18:07,680 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 12 [2024-09-25 00:18:07,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:18:07,682 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2024-09-25 00:18:07,682 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 00:18:07,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:07,684 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2024-09-25 00:18:07,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-25 00:18:07,686 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:18:07,686 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:18:07,686 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-25 00:18:07,686 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:18:07,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:07,689 INFO L85 PathProgramCache]: Analyzing trace with hash -603068878, now seen corresponding path program 1 times [2024-09-25 00:18:07,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:18:07,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118461951] [2024-09-25 00:18:07,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:18:07,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:18:07,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:08,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:18:08,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:08,020 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 00:18:08,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:08,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 00:18:08,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:18:08,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118461951] [2024-09-25 00:18:08,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118461951] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 00:18:08,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 00:18:08,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-25 00:18:08,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288245896] [2024-09-25 00:18:08,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 00:18:08,034 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-25 00:18:08,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:18:08,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-25 00:18:08,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-25 00:18:08,035 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-25 00:18:08,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:18:08,185 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2024-09-25 00:18:08,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-25 00:18:08,186 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2024-09-25 00:18:08,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:18:08,187 INFO L225 Difference]: With dead ends: 50 [2024-09-25 00:18:08,187 INFO L226 Difference]: Without dead ends: 48 [2024-09-25 00:18:08,188 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-25 00:18:08,189 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 17 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:18:08,189 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 240 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:18:08,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-25 00:18:08,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-09-25 00:18:08,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-25 00:18:08,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2024-09-25 00:18:08,207 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 18 [2024-09-25 00:18:08,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:18:08,208 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2024-09-25 00:18:08,209 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-25 00:18:08,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:08,210 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2024-09-25 00:18:08,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-25 00:18:08,214 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:18:08,214 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] [2024-09-25 00:18:08,214 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-25 00:18:08,215 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:18:08,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:08,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1373219252, now seen corresponding path program 1 times [2024-09-25 00:18:08,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:18:08,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058789787] [2024-09-25 00:18:08,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:18:08,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:18:08,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:18:08,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1331202714] [2024-09-25 00:18:08,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:18:08,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:18:08,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:18:08,254 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) [2024-09-25 00:18:08,255 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-25 00:18:08,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:08,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-25 00:18:08,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:18:08,464 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 [2024-09-25 00:18:08,469 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 [2024-09-25 00:18:08,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:18:08,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 00:18:08,890 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:18:09,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 00:18:09,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:18:09,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058789787] [2024-09-25 00:18:09,075 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:18:09,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331202714] [2024-09-25 00:18:09,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331202714] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-25 00:18:09,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:18:09,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-09-25 00:18:09,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590072119] [2024-09-25 00:18:09,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 00:18:09,076 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-25 00:18:09,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:18:09,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-25 00:18:09,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-25 00:18:09,080 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-25 00:18:09,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:18:09,336 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2024-09-25 00:18:09,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-25 00:18:09,337 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-09-25 00:18:09,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:18:09,339 INFO L225 Difference]: With dead ends: 59 [2024-09-25 00:18:09,340 INFO L226 Difference]: Without dead ends: 57 [2024-09-25 00:18:09,340 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-09-25 00:18:09,341 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 00:18:09,342 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 232 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 00:18:09,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-25 00:18:09,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2024-09-25 00:18:09,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-25 00:18:09,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2024-09-25 00:18:09,365 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 24 [2024-09-25 00:18:09,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:18:09,365 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2024-09-25 00:18:09,366 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-25 00:18:09,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:09,366 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2024-09-25 00:18:09,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-25 00:18:09,367 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:18:09,367 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] [2024-09-25 00:18:09,387 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-25 00:18:09,568 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 [2024-09-25 00:18:09,569 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:18:09,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:09,569 INFO L85 PathProgramCache]: Analyzing trace with hash 257250778, now seen corresponding path program 1 times [2024-09-25 00:18:09,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:18:09,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104064902] [2024-09-25 00:18:09,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:18:09,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:18:09,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:18:09,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840162805] [2024-09-25 00:18:09,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:18:09,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:18:09,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:18:09,613 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) [2024-09-25 00:18:09,615 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-25 00:18:09,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:09,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-25 00:18:09,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:18:09,757 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 [2024-09-25 00:18:09,759 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 [2024-09-25 00:18:09,764 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 [2024-09-25 00:18:10,062 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 [2024-09-25 00:18:10,067 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 [2024-09-25 00:18:10,103 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 00:18:10,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:18:10,249 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 00:18:10,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:18:10,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104064902] [2024-09-25 00:18:10,249 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:18:10,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840162805] [2024-09-25 00:18:10,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840162805] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-25 00:18:10,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:18:10,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 9 [2024-09-25 00:18:10,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297213186] [2024-09-25 00:18:10,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 00:18:10,250 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-25 00:18:10,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:18:10,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-25 00:18:10,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-09-25 00:18:10,254 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-25 00:18:10,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:18:10,437 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2024-09-25 00:18:10,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-25 00:18:10,438 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2024-09-25 00:18:10,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:18:10,442 INFO L225 Difference]: With dead ends: 72 [2024-09-25 00:18:10,442 INFO L226 Difference]: Without dead ends: 70 [2024-09-25 00:18:10,442 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-09-25 00:18:10,443 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 19 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:18:10,443 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 264 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:18:10,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-09-25 00:18:10,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2024-09-25 00:18:10,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 46 states have internal predecessors, (48), 16 states have call successors, (16), 10 states have call predecessors, (16), 10 states have return successors, (18), 14 states have call predecessors, (18), 14 states have call successors, (18) [2024-09-25 00:18:10,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2024-09-25 00:18:10,470 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 36 [2024-09-25 00:18:10,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:18:10,470 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2024-09-25 00:18:10,471 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-25 00:18:10,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:10,471 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2024-09-25 00:18:10,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-25 00:18:10,474 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:18:10,474 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] [2024-09-25 00:18:10,496 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-25 00:18:10,676 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 [2024-09-25 00:18:10,676 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:18:10,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:10,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1949399703, now seen corresponding path program 1 times [2024-09-25 00:18:10,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:18:10,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349651225] [2024-09-25 00:18:10,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:18:10,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:18:10,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:18:10,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [130583513] [2024-09-25 00:18:10,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:18:10,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:18:10,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:18:10,712 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) [2024-09-25 00:18:10,713 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-25 00:18:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:10,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-25 00:18:10,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:18:10,853 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 [2024-09-25 00:18:10,859 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 [2024-09-25 00:18:10,866 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 [2024-09-25 00:18:11,224 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 00:18:11,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:18:11,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:18:11,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349651225] [2024-09-25 00:18:11,913 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:18:11,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130583513] [2024-09-25 00:18:11,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130583513] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:18:11,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:18:11,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-09-25 00:18:11,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132458973] [2024-09-25 00:18:11,914 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:18:11,914 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-25 00:18:11,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:18:11,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-25 00:18:11,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-09-25 00:18:11,916 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-25 00:18:12,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:18:12,489 INFO L93 Difference]: Finished difference Result 126 states and 143 transitions. [2024-09-25 00:18:12,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-25 00:18:12,490 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 42 [2024-09-25 00:18:12,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:18:12,495 INFO L225 Difference]: With dead ends: 126 [2024-09-25 00:18:12,496 INFO L226 Difference]: Without dead ends: 124 [2024-09-25 00:18:12,496 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2024-09-25 00:18:12,497 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 80 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 00:18:12,498 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 132 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 00:18:12,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-09-25 00:18:12,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2024-09-25 00:18:12,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 81 states have internal predecessors, (86), 24 states have call successors, (24), 18 states have call predecessors, (24), 20 states have return successors, (30), 22 states have call predecessors, (30), 21 states have call successors, (30) [2024-09-25 00:18:12,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 140 transitions. [2024-09-25 00:18:12,555 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 140 transitions. Word has length 42 [2024-09-25 00:18:12,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:18:12,555 INFO L474 AbstractCegarLoop]: Abstraction has 122 states and 140 transitions. [2024-09-25 00:18:12,555 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-25 00:18:12,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:12,556 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 140 transitions. [2024-09-25 00:18:12,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-25 00:18:12,557 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:18:12,558 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] [2024-09-25 00:18:12,577 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-25 00:18:12,761 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 [2024-09-25 00:18:12,762 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:18:12,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:12,762 INFO L85 PathProgramCache]: Analyzing trace with hash -605627993, now seen corresponding path program 1 times [2024-09-25 00:18:12,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:18:12,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650773739] [2024-09-25 00:18:12,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:18:12,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:18:12,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:18:12,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1032731661] [2024-09-25 00:18:12,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:18:12,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:18:12,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:18:12,811 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) [2024-09-25 00:18:12,814 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-25 00:18:12,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:12,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-25 00:18:12,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:18:12,957 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 [2024-09-25 00:18:12,963 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 [2024-09-25 00:18:12,970 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 [2024-09-25 00:18:13,153 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 [2024-09-25 00:18:13,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:18:13,237 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 [2024-09-25 00:18:13,284 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-25 00:18:13,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:18:13,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:18:13,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650773739] [2024-09-25 00:18:13,488 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:18:13,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032731661] [2024-09-25 00:18:13,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032731661] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:18:13,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:18:13,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-09-25 00:18:13,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744196132] [2024-09-25 00:18:13,489 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:18:13,489 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-25 00:18:13,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:18:13,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-25 00:18:13,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-09-25 00:18:13,490 INFO L87 Difference]: Start difference. First operand 122 states and 140 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-25 00:18:13,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:18:13,997 INFO L93 Difference]: Finished difference Result 140 states and 159 transitions. [2024-09-25 00:18:13,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-25 00:18:13,998 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2024-09-25 00:18:13,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:18:14,000 INFO L225 Difference]: With dead ends: 140 [2024-09-25 00:18:14,000 INFO L226 Difference]: Without dead ends: 136 [2024-09-25 00:18:14,001 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2024-09-25 00:18:14,002 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 44 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 00:18:14,002 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 92 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 00:18:14,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-09-25 00:18:14,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2024-09-25 00:18:14,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 84 states have (on average 1.1071428571428572) internal successors, (93), 87 states have internal predecessors, (93), 26 states have call successors, (26), 20 states have call predecessors, (26), 21 states have return successors, (31), 24 states have call predecessors, (31), 22 states have call successors, (31) [2024-09-25 00:18:14,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 150 transitions. [2024-09-25 00:18:14,070 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 150 transitions. Word has length 52 [2024-09-25 00:18:14,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:18:14,071 INFO L474 AbstractCegarLoop]: Abstraction has 132 states and 150 transitions. [2024-09-25 00:18:14,071 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-25 00:18:14,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:14,071 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 150 transitions. [2024-09-25 00:18:14,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-25 00:18:14,074 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:18:14,074 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:18:14,088 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-25 00:18:14,275 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 [2024-09-25 00:18:14,275 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:18:14,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:14,276 INFO L85 PathProgramCache]: Analyzing trace with hash -649217709, now seen corresponding path program 1 times [2024-09-25 00:18:14,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:18:14,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634271684] [2024-09-25 00:18:14,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:18:14,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:18:14,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:14,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:18:14,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:14,596 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:18:14,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:14,654 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:18:14,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:14,658 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 00:18:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:14,662 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-25 00:18:14,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:14,665 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 00:18:14,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:14,669 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-25 00:18:14,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:14,673 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 00:18:14,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:18:14,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634271684] [2024-09-25 00:18:14,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634271684] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 00:18:14,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 00:18:14,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-25 00:18:14,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520001386] [2024-09-25 00:18:14,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 00:18:14,675 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-25 00:18:14,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:18:14,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-25 00:18:14,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-25 00:18:14,675 INFO L87 Difference]: Start difference. First operand 132 states and 150 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-25 00:18:14,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:18:14,939 INFO L93 Difference]: Finished difference Result 180 states and 207 transitions. [2024-09-25 00:18:14,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-25 00:18:14,940 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 53 [2024-09-25 00:18:14,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:18:14,942 INFO L225 Difference]: With dead ends: 180 [2024-09-25 00:18:14,942 INFO L226 Difference]: Without dead ends: 132 [2024-09-25 00:18:14,942 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-09-25 00:18:14,943 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 36 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 00:18:14,943 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 104 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 00:18:14,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-09-25 00:18:14,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2024-09-25 00:18:14,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 83 states have (on average 1.0963855421686748) internal successors, (91), 86 states have internal predecessors, (91), 26 states have call successors, (26), 20 states have call predecessors, (26), 20 states have return successors, (27), 24 states have call predecessors, (27), 22 states have call successors, (27) [2024-09-25 00:18:14,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 144 transitions. [2024-09-25 00:18:14,987 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 144 transitions. Word has length 53 [2024-09-25 00:18:14,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:18:14,987 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 144 transitions. [2024-09-25 00:18:14,987 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-25 00:18:14,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:14,988 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 144 transitions. [2024-09-25 00:18:14,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-25 00:18:14,990 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:18:14,990 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] [2024-09-25 00:18:14,991 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-25 00:18:14,991 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:18:14,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:14,991 INFO L85 PathProgramCache]: Analyzing trace with hash 217789429, now seen corresponding path program 1 times [2024-09-25 00:18:14,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:18:14,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201770802] [2024-09-25 00:18:14,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:18:14,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:18:15,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:15,297 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:18:15,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:15,310 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:18:15,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:15,353 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:18:15,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:15,361 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 00:18:15,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:15,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-25 00:18:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:15,388 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-25 00:18:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:15,437 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:18:15,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:15,443 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 00:18:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:15,448 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-25 00:18:15,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:15,454 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-25 00:18:15,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:18:15,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201770802] [2024-09-25 00:18:15,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201770802] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 00:18:15,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 00:18:15,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-25 00:18:15,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155024507] [2024-09-25 00:18:15,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 00:18:15,457 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-25 00:18:15,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:18:15,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-25 00:18:15,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-09-25 00:18:15,458 INFO L87 Difference]: Start difference. First operand 130 states and 144 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-25 00:18:15,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:18:15,710 INFO L93 Difference]: Finished difference Result 134 states and 148 transitions. [2024-09-25 00:18:15,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-25 00:18:15,710 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 58 [2024-09-25 00:18:15,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:18:15,712 INFO L225 Difference]: With dead ends: 134 [2024-09-25 00:18:15,712 INFO L226 Difference]: Without dead ends: 102 [2024-09-25 00:18:15,712 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-09-25 00:18:15,713 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 45 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 00:18:15,713 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 74 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 00:18:15,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-09-25 00:18:15,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2024-09-25 00:18:15,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 66 states have internal predecessors, (70), 21 states have call successors, (21), 15 states have call predecessors, (21), 15 states have return successors, (22), 19 states have call predecessors, (22), 18 states have call successors, (22) [2024-09-25 00:18:15,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 113 transitions. [2024-09-25 00:18:15,738 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 113 transitions. Word has length 58 [2024-09-25 00:18:15,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:18:15,738 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 113 transitions. [2024-09-25 00:18:15,738 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-25 00:18:15,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:15,738 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 113 transitions. [2024-09-25 00:18:15,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-25 00:18:15,739 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:18:15,739 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:18:15,739 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-09-25 00:18:15,740 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:18:15,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:15,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1027870564, now seen corresponding path program 1 times [2024-09-25 00:18:15,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:18:15,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931101626] [2024-09-25 00:18:15,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:18:15,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:18:15,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:18:15,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [876646223] [2024-09-25 00:18:15,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:18:15,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:18:15,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:18:15,783 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) [2024-09-25 00:18:15,785 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-25 00:18:15,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:15,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-09-25 00:18:15,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:18:15,940 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 [2024-09-25 00:18:15,945 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 [2024-09-25 00:18:15,950 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 [2024-09-25 00:18:16,327 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 [2024-09-25 00:18:16,335 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 [2024-09-25 00:18:16,567 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-25 00:18:16,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:18:16,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:18:16,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931101626] [2024-09-25 00:18:16,930 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:18:16,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876646223] [2024-09-25 00:18:16,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876646223] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:18:16,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:18:16,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2024-09-25 00:18:16,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846692155] [2024-09-25 00:18:16,931 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:18:16,931 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-25 00:18:16,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:18:16,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-25 00:18:16,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-09-25 00:18:16,932 INFO L87 Difference]: Start difference. First operand 100 states and 113 transitions. Second operand has 14 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-25 00:18:17,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:18:17,648 INFO L93 Difference]: Finished difference Result 134 states and 152 transitions. [2024-09-25 00:18:17,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-25 00:18:17,649 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 66 [2024-09-25 00:18:17,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:18:17,653 INFO L225 Difference]: With dead ends: 134 [2024-09-25 00:18:17,653 INFO L226 Difference]: Without dead ends: 132 [2024-09-25 00:18:17,654 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2024-09-25 00:18:17,656 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 54 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-25 00:18:17,656 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 137 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-25 00:18:17,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-09-25 00:18:17,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2024-09-25 00:18:17,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 82 states have (on average 1.1097560975609757) internal successors, (91), 85 states have internal predecessors, (91), 26 states have call successors, (26), 19 states have call predecessors, (26), 21 states have return successors, (32), 25 states have call predecessors, (32), 22 states have call successors, (32) [2024-09-25 00:18:17,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 149 transitions. [2024-09-25 00:18:17,719 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 149 transitions. Word has length 66 [2024-09-25 00:18:17,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:18:17,719 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 149 transitions. [2024-09-25 00:18:17,720 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-25 00:18:17,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:17,720 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 149 transitions. [2024-09-25 00:18:17,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-09-25 00:18:17,721 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:18:17,722 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:18:17,741 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-25 00:18:17,922 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:18:17,923 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:18:17,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:17,923 INFO L85 PathProgramCache]: Analyzing trace with hash -409790049, now seen corresponding path program 2 times [2024-09-25 00:18:17,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:18:17,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655257259] [2024-09-25 00:18:17,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:18:17,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:18:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:18:17,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [189926936] [2024-09-25 00:18:17,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 00:18:17,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:18:17,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:18:17,982 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) [2024-09-25 00:18:17,985 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-25 00:18:18,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 00:18:18,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:18:18,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 161 conjuncts are in the unsatisfiable core [2024-09-25 00:18:18,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:18:18,201 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 [2024-09-25 00:18:18,206 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 [2024-09-25 00:18:18,217 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 [2024-09-25 00:18:18,223 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 [2024-09-25 00:18:18,230 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 [2024-09-25 00:18:19,468 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 [2024-09-25 00:18:19,476 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 [2024-09-25 00:18:39,798 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 12 proven. 63 refuted. 33 times theorem prover too weak. 126 trivial. 0 not checked. [2024-09-25 00:18:39,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:18:41,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:18:41,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655257259] [2024-09-25 00:18:41,132 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:18:41,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189926936] [2024-09-25 00:18:41,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189926936] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:18:41,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:18:41,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-25 00:18:41,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338631334] [2024-09-25 00:18:41,133 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:18:41,134 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-25 00:18:41,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:18:41,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-25 00:18:41,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=720, Unknown=4, NotChecked=0, Total=812 [2024-09-25 00:18:41,135 INFO L87 Difference]: Start difference. First operand 130 states and 149 transitions. Second operand has 20 states, 15 states have (on average 2.4) internal successors, (36), 17 states have internal predecessors, (36), 11 states have call successors, (16), 6 states have call predecessors, (16), 7 states have return successors, (13), 8 states have call predecessors, (13), 9 states have call successors, (13) [2024-09-25 00:19:07,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 00:19:11,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 00:19:11,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:19:11,273 INFO L93 Difference]: Finished difference Result 164 states and 186 transitions. [2024-09-25 00:19:11,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-25 00:19:11,276 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 2.4) internal successors, (36), 17 states have internal predecessors, (36), 11 states have call successors, (16), 6 states have call predecessors, (16), 7 states have return successors, (13), 8 states have call predecessors, (13), 9 states have call successors, (13) Word has length 90 [2024-09-25 00:19:11,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:19:11,278 INFO L225 Difference]: With dead ends: 164 [2024-09-25 00:19:11,278 INFO L226 Difference]: Without dead ends: 162 [2024-09-25 00:19:11,279 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 41.7s TimeCoverageRelationStatistics Valid=235, Invalid=1736, Unknown=9, NotChecked=0, Total=1980 [2024-09-25 00:19:11,280 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 56 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 30 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2024-09-25 00:19:11,280 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 309 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1003 Invalid, 2 Unknown, 0 Unchecked, 9.2s Time] [2024-09-25 00:19:11,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-09-25 00:19:11,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 132. [2024-09-25 00:19:11,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 83 states have (on average 1.108433734939759) internal successors, (92), 86 states have internal predecessors, (92), 26 states have call successors, (26), 19 states have call predecessors, (26), 22 states have return successors, (34), 26 states have call predecessors, (34), 22 states have call successors, (34) [2024-09-25 00:19:11,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 152 transitions. [2024-09-25 00:19:11,329 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 152 transitions. Word has length 90 [2024-09-25 00:19:11,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:19:11,330 INFO L474 AbstractCegarLoop]: Abstraction has 132 states and 152 transitions. [2024-09-25 00:19:11,330 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 2.4) internal successors, (36), 17 states have internal predecessors, (36), 11 states have call successors, (16), 6 states have call predecessors, (16), 7 states have return successors, (13), 8 states have call predecessors, (13), 9 states have call successors, (13) [2024-09-25 00:19:11,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:19:11,331 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 152 transitions. [2024-09-25 00:19:11,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-09-25 00:19:11,332 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:19:11,332 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:19:11,348 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-25 00:19:11,533 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-25 00:19:11,534 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:19:11,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:19:11,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1410569242, now seen corresponding path program 3 times [2024-09-25 00:19:11,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:19:11,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618683609] [2024-09-25 00:19:11,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:19:11,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:19:11,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:19:11,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [889593280] [2024-09-25 00:19:11,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 00:19:11,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:19:11,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:19:11,599 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) [2024-09-25 00:19:11,600 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-25 00:19:11,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-25 00:19:11,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:19:11,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 140 conjuncts are in the unsatisfiable core [2024-09-25 00:19:11,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:19:11,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 [2024-09-25 00:19:11,831 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 [2024-09-25 00:19:11,837 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 [2024-09-25 00:19:11,843 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 [2024-09-25 00:19:12,522 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 [2024-09-25 00:19:12,533 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 [2024-09-25 00:19:12,777 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 48 proven. 64 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2024-09-25 00:19:12,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:19:13,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:19:13,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618683609] [2024-09-25 00:19:13,758 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:19:13,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889593280] [2024-09-25 00:19:13,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889593280] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:19:13,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:19:13,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-25 00:19:13,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785459661] [2024-09-25 00:19:13,758 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:19:13,758 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-25 00:19:13,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:19:13,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-25 00:19:13,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2024-09-25 00:19:13,760 INFO L87 Difference]: Start difference. First operand 132 states and 152 transitions. Second operand has 17 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-25 00:19:14,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:19:14,898 INFO L93 Difference]: Finished difference Result 164 states and 188 transitions. [2024-09-25 00:19:14,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-25 00:19:14,899 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) Word has length 114 [2024-09-25 00:19:14,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:19:14,900 INFO L225 Difference]: With dead ends: 164 [2024-09-25 00:19:14,900 INFO L226 Difference]: Without dead ends: 162 [2024-09-25 00:19:14,901 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2024-09-25 00:19:14,901 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 44 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-25 00:19:14,901 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 271 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-25 00:19:14,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-09-25 00:19:14,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 134. [2024-09-25 00:19:14,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 84 states have (on average 1.1071428571428572) internal successors, (93), 87 states have internal predecessors, (93), 26 states have call successors, (26), 19 states have call predecessors, (26), 23 states have return successors, (36), 27 states have call predecessors, (36), 22 states have call successors, (36) [2024-09-25 00:19:14,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 155 transitions. [2024-09-25 00:19:14,940 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 155 transitions. Word has length 114 [2024-09-25 00:19:14,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:19:14,941 INFO L474 AbstractCegarLoop]: Abstraction has 134 states and 155 transitions. [2024-09-25 00:19:14,941 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-25 00:19:14,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:19:14,941 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 155 transitions. [2024-09-25 00:19:14,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-09-25 00:19:14,942 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:19:14,942 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:19:14,957 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-25 00:19:15,143 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:19:15,143 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:19:15,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:19:15,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1625386709, now seen corresponding path program 4 times [2024-09-25 00:19:15,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:19:15,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179841886] [2024-09-25 00:19:15,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:19:15,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:19:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:19:15,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1948668385] [2024-09-25 00:19:15,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 00:19:15,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:19:15,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:19:15,218 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) [2024-09-25 00:19:15,219 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-25 00:19:15,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 00:19:15,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:19:15,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 192 conjuncts are in the unsatisfiable core [2024-09-25 00:19:15,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:19:15,677 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 17 treesize of output 9 [2024-09-25 00:19:15,960 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 17 treesize of output 9 [2024-09-25 00:19:40,444 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 27 treesize of output 15 [2024-09-25 00:20:57,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 33 [2024-09-25 00:20:57,326 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 [2024-09-25 00:20:57,332 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 [2024-09-25 00:21:05,528 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 194 proven. 36 refuted. 0 times theorem prover too weak. 398 trivial. 0 not checked. [2024-09-25 00:21:05,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:21:08,682 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:21:08,682 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 102 treesize of output 101 [2024-09-25 00:21:08,716 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:21:08,717 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 128 treesize of output 119 [2024-09-25 00:21:09,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:21:09,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179841886] [2024-09-25 00:21:09,216 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:21:09,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948668385] [2024-09-25 00:21:09,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948668385] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:21:09,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:21:09,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-25 00:21:09,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506516716] [2024-09-25 00:21:09,217 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:21:09,217 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-25 00:21:09,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:21:09,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-25 00:21:09,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2024-09-25 00:21:09,218 INFO L87 Difference]: Start difference. First operand 134 states and 155 transitions. Second operand has 24 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 19 states have internal predecessors, (41), 11 states have call successors, (19), 6 states have call predecessors, (19), 7 states have return successors, (16), 10 states have call predecessors, (16), 9 states have call successors, (16) [2024-09-25 00:21:34,864 WARN L293 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-25 00:21:59,318 WARN L293 SmtUtils]: Spent 12.09s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-25 00:22:08,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:22:08,676 INFO L93 Difference]: Finished difference Result 189 states and 214 transitions. [2024-09-25 00:22:08,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-25 00:22:08,677 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 19 states have internal predecessors, (41), 11 states have call successors, (19), 6 states have call predecessors, (19), 7 states have return successors, (16), 10 states have call predecessors, (16), 9 states have call successors, (16) Word has length 138 [2024-09-25 00:22:08,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:22:08,679 INFO L225 Difference]: With dead ends: 189 [2024-09-25 00:22:08,679 INFO L226 Difference]: Without dead ends: 187 [2024-09-25 00:22:08,681 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 124 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 91.1s TimeCoverageRelationStatistics Valid=259, Invalid=1997, Unknown=0, NotChecked=0, Total=2256 [2024-09-25 00:22:08,681 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 57 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:22:08,682 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 365 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-09-25 00:22:08,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2024-09-25 00:22:08,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 127. [2024-09-25 00:22:08,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 81 states have (on average 1.1111111111111112) internal successors, (90), 84 states have internal predecessors, (90), 25 states have call successors, (25), 19 states have call predecessors, (25), 20 states have return successors, (27), 23 states have call predecessors, (27), 21 states have call successors, (27) [2024-09-25 00:22:08,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 142 transitions. [2024-09-25 00:22:08,733 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 142 transitions. Word has length 138 [2024-09-25 00:22:08,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:22:08,734 INFO L474 AbstractCegarLoop]: Abstraction has 127 states and 142 transitions. [2024-09-25 00:22:08,734 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 19 states have internal predecessors, (41), 11 states have call successors, (19), 6 states have call predecessors, (19), 7 states have return successors, (16), 10 states have call predecessors, (16), 9 states have call successors, (16) [2024-09-25 00:22:08,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:22:08,734 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 142 transitions. [2024-09-25 00:22:08,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-09-25 00:22:08,735 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:22:08,735 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:22:08,751 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-25 00:22:08,936 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:22:08,937 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:22:08,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:22:08,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1593861602, now seen corresponding path program 1 times [2024-09-25 00:22:08,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:22:08,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643539981] [2024-09-25 00:22:08,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:22:08,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:22:08,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:22:09,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:22:09,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:22:09,259 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:22:09,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:22:09,365 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:22:09,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:22:09,369 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 00:22:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:22:09,374 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-25 00:22:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:22:09,378 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 00:22:09,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:22:09,408 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:22:09,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:22:09,412 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 00:22:09,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:22:09,414 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-25 00:22:09,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:22:09,429 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-25 00:22:09,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:22:09,500 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:22:09,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:22:09,506 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 00:22:09,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:22:09,511 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-09-25 00:22:09,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:22:09,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643539981] [2024-09-25 00:22:09,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643539981] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:22:09,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484012909] [2024-09-25 00:22:09,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:22:09,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:22:09,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:22:09,514 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) [2024-09-25 00:22:09,515 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-25 00:22:09,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:22:09,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-25 00:22:09,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:22:09,687 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 [2024-09-25 00:22:09,791 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 [2024-09-25 00:22:09,872 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-09-25 00:22:09,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:22:10,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484012909] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:22:10,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:22:10,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2024-09-25 00:22:10,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688644628] [2024-09-25 00:22:10,154 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:22:10,155 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-25 00:22:10,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:22:10,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-25 00:22:10,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2024-09-25 00:22:10,156 INFO L87 Difference]: Start difference. First operand 127 states and 142 transitions. Second operand has 19 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 15 states have internal predecessors, (41), 11 states have call successors, (20), 5 states have call predecessors, (20), 6 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2024-09-25 00:22:10,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:22:10,564 INFO L93 Difference]: Finished difference Result 132 states and 150 transitions. [2024-09-25 00:22:10,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-25 00:22:10,565 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 15 states have internal predecessors, (41), 11 states have call successors, (20), 5 states have call predecessors, (20), 6 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) Word has length 76 [2024-09-25 00:22:10,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:22:10,566 INFO L225 Difference]: With dead ends: 132 [2024-09-25 00:22:10,566 INFO L226 Difference]: Without dead ends: 120 [2024-09-25 00:22:10,567 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=659, Unknown=0, NotChecked=0, Total=812 [2024-09-25 00:22:10,568 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 41 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 00:22:10,568 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 90 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 00:22:10,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-09-25 00:22:10,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2024-09-25 00:22:10,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 75 states have (on average 1.0933333333333333) internal successors, (82), 77 states have internal predecessors, (82), 23 states have call successors, (23), 18 states have call predecessors, (23), 18 states have return successors, (25), 21 states have call predecessors, (25), 20 states have call successors, (25) [2024-09-25 00:22:10,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 130 transitions. [2024-09-25 00:22:10,611 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 130 transitions. Word has length 76 [2024-09-25 00:22:10,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:22:10,612 INFO L474 AbstractCegarLoop]: Abstraction has 117 states and 130 transitions. [2024-09-25 00:22:10,612 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 15 states have internal predecessors, (41), 11 states have call successors, (20), 5 states have call predecessors, (20), 6 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2024-09-25 00:22:10,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:22:10,612 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 130 transitions. [2024-09-25 00:22:10,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-09-25 00:22:10,613 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:22:10,613 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:22:10,632 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-25 00:22:10,813 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-25 00:22:10,814 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:22:10,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:22:10,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1184517000, now seen corresponding path program 1 times [2024-09-25 00:22:10,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:22:10,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984001508] [2024-09-25 00:22:10,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:22:10,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:22:10,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:22:10,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [308400440] [2024-09-25 00:22:10,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:22:10,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:22:10,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:22:10,872 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) [2024-09-25 00:22:10,873 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-25 00:22:11,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:22:11,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 188 conjuncts are in the unsatisfiable core [2024-09-25 00:22:11,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:22:11,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:22:11,086 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 [2024-09-25 00:22:11,091 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 [2024-09-25 00:22:11,097 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 [2024-09-25 00:22:11,103 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 11 treesize of output 7 [2024-09-25 00:22:11,111 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 [2024-09-25 00:22:11,665 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 [2024-09-25 00:22:11,672 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 [2024-09-25 00:22:12,232 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 [2024-09-25 00:22:12,249 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 [2024-09-25 00:22:12,309 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-25 00:22:12,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-09-25 00:22:12,341 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-09-25 00:22:12,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 51 [2024-09-25 00:22:12,698 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:22:12,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 88 treesize of output 172 [2024-09-25 00:22:12,751 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:22:12,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 140 treesize of output 168 [2024-09-25 00:22:12,990 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 48 proven. 29 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-09-25 00:22:12,991 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:22:16,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:22:16,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984001508] [2024-09-25 00:22:16,131 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:22:16,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308400440] [2024-09-25 00:22:16,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308400440] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:22:16,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:22:16,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-25 00:22:16,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605941362] [2024-09-25 00:22:16,131 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:22:16,131 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-25 00:22:16,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:22:16,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-25 00:22:16,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2024-09-25 00:22:16,132 INFO L87 Difference]: Start difference. First operand 117 states and 130 transitions. Second operand has 19 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2024-09-25 00:22:17,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:22:17,484 INFO L93 Difference]: Finished difference Result 159 states and 186 transitions. [2024-09-25 00:22:17,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-25 00:22:17,485 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 77 [2024-09-25 00:22:17,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:22:17,486 INFO L225 Difference]: With dead ends: 159 [2024-09-25 00:22:17,486 INFO L226 Difference]: Without dead ends: 157 [2024-09-25 00:22:17,487 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=161, Invalid=1099, Unknown=0, NotChecked=0, Total=1260 [2024-09-25 00:22:17,487 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 67 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 32 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-25 00:22:17,487 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 205 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 622 Invalid, 1 Unknown, 0 Unchecked, 0.8s Time] [2024-09-25 00:22:17,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-09-25 00:22:17,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 153. [2024-09-25 00:22:17,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 99 states have (on average 1.101010101010101) internal successors, (109), 101 states have internal predecessors, (109), 29 states have call successors, (29), 23 states have call predecessors, (29), 24 states have return successors, (37), 28 states have call predecessors, (37), 26 states have call successors, (37) [2024-09-25 00:22:17,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 175 transitions. [2024-09-25 00:22:17,562 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 175 transitions. Word has length 77 [2024-09-25 00:22:17,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:22:17,562 INFO L474 AbstractCegarLoop]: Abstraction has 153 states and 175 transitions. [2024-09-25 00:22:17,563 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2024-09-25 00:22:17,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:22:17,563 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 175 transitions. [2024-09-25 00:22:17,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-09-25 00:22:17,564 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:22:17,564 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:22:17,580 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-25 00:22:17,765 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-25 00:22:17,765 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:22:17,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:22:17,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1910667427, now seen corresponding path program 2 times [2024-09-25 00:22:17,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:22:17,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521912205] [2024-09-25 00:22:17,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:22:17,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:22:17,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:22:17,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1933665987] [2024-09-25 00:22:17,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 00:22:17,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:22:17,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:22:17,839 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) [2024-09-25 00:22:17,840 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-25 00:22:18,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 00:22:18,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:22:18,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 201 conjuncts are in the unsatisfiable core [2024-09-25 00:22:18,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:22:18,114 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 [2024-09-25 00:22:18,125 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 [2024-09-25 00:22:18,130 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 [2024-09-25 00:22:18,139 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 [2024-09-25 00:22:18,147 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 [2024-09-25 00:22:18,152 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 [2024-09-25 00:22:19,045 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 [2024-09-25 00:22:19,058 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 [2024-09-25 00:22:19,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:22:19,608 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 [2024-09-25 00:22:19,698 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-09-25 00:22:19,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 51 [2024-09-25 00:22:19,749 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-25 00:22:19,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-09-25 00:22:20,050 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:22:20,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 88 treesize of output 172 [2024-09-25 00:22:20,090 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:22:20,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 140 treesize of output 168 [2024-09-25 00:22:20,252 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 72 proven. 48 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2024-09-25 00:22:20,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:22:23,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:22:23,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521912205] [2024-09-25 00:22:23,975 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:22:23,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933665987] [2024-09-25 00:22:23,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933665987] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:22:23,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:22:23,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-25 00:22:23,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632230065] [2024-09-25 00:22:23,975 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:22:23,976 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-25 00:22:23,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:22:23,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-25 00:22:23,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2024-09-25 00:22:23,977 INFO L87 Difference]: Start difference. First operand 153 states and 175 transitions. Second operand has 19 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-25 00:22:25,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:22:25,759 INFO L93 Difference]: Finished difference Result 195 states and 231 transitions. [2024-09-25 00:22:25,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-25 00:22:25,760 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 101 [2024-09-25 00:22:25,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:22:25,762 INFO L225 Difference]: With dead ends: 195 [2024-09-25 00:22:25,762 INFO L226 Difference]: Without dead ends: 193 [2024-09-25 00:22:25,763 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 96 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2024-09-25 00:22:25,764 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 60 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-25 00:22:25,764 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 299 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 924 Invalid, 1 Unknown, 0 Unchecked, 1.2s Time] [2024-09-25 00:22:25,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-09-25 00:22:25,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 155. [2024-09-25 00:22:25,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 100 states have (on average 1.1) internal successors, (110), 102 states have internal predecessors, (110), 29 states have call successors, (29), 23 states have call predecessors, (29), 25 states have return successors, (39), 29 states have call predecessors, (39), 26 states have call successors, (39) [2024-09-25 00:22:25,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 178 transitions. [2024-09-25 00:22:25,851 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 178 transitions. Word has length 101 [2024-09-25 00:22:25,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:22:25,852 INFO L474 AbstractCegarLoop]: Abstraction has 155 states and 178 transitions. [2024-09-25 00:22:25,852 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-25 00:22:25,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:22:25,852 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 178 transitions. [2024-09-25 00:22:25,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-09-25 00:22:25,854 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:22:25,854 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:22:25,875 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-25 00:22:26,054 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-25 00:22:26,055 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:22:26,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:22:26,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1396227582, now seen corresponding path program 3 times [2024-09-25 00:22:26,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:22:26,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531672707] [2024-09-25 00:22:26,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:22:26,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:22:26,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:22:26,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [321693751] [2024-09-25 00:22:26,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 00:22:26,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:22:26,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:22:26,116 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) [2024-09-25 00:22:26,119 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-25 00:22:26,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-25 00:22:26,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:22:26,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 269 conjuncts are in the unsatisfiable core [2024-09-25 00:22:26,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:22:26,465 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 [2024-09-25 00:22:26,474 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 [2024-09-25 00:22:26,482 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 [2024-09-25 00:22:26,489 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 [2024-09-25 00:22:26,499 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 [2024-09-25 00:22:26,510 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 [2024-09-25 00:22:27,998 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 [2024-09-25 00:22:28,009 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 [2024-09-25 00:22:28,649 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 [2024-09-25 00:22:28,655 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 [2024-09-25 00:22:28,734 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-09-25 00:22:28,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 25 [2024-09-25 00:22:28,768 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-09-25 00:22:28,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 51