./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 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1d5fa637 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_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 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-1d5fa63-m [2024-09-13 09:58:37,046 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 09:58:37,118 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 09:58:37,125 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 09:58:37,127 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 09:58:37,157 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 09:58:37,158 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 09:58:37,158 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 09:58:37,159 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 09:58:37,160 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 09:58:37,160 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 09:58:37,160 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 09:58:37,161 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 09:58:37,163 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 09:58:37,163 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 09:58:37,164 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 09:58:37,164 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 09:58:37,164 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 09:58:37,164 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 09:58:37,165 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 09:58:37,165 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 09:58:37,166 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 09:58:37,167 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 09:58:37,167 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 09:58:37,167 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 09:58:37,168 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 09:58:37,168 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 09:58:37,168 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 09:58:37,172 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 09:58:37,172 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 09:58:37,172 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 09:58:37,172 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 09:58:37,173 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 09:58:37,173 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 09:58:37,173 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 09:58:37,173 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 09:58:37,173 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 09:58:37,174 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 09:58:37,174 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 09:58:37,174 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 09:58:37,174 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 09:58:37,176 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 09:58:37,176 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8571897e57404ad6e85df2c29745d5b56fa4d168673d3bc7c670c79b03a6c106 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-13 09:58:37,412 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 09:58:37,436 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 09:58:37,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 09:58:37,439 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 09:58:37,440 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 09:58:37,441 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.c [2024-09-13 09:58:38,797 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 09:58:38,960 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 09:58:38,960 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.c [2024-09-13 09:58:38,967 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/b1790528a/b8515f3829734a49a8d759de53607131/FLAG8dbcba23d [2024-09-13 09:58:38,980 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/b1790528a/b8515f3829734a49a8d759de53607131 [2024-09-13 09:58:38,986 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 09:58:38,988 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-13 09:58:38,991 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 09:58:38,991 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 09:58:38,997 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 09:58:38,998 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 09:58:38" (1/1) ... [2024-09-13 09:58:38,999 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9d0ec26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:58:38, skipping insertion in model container [2024-09-13 09:58:38,999 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 09:58:38" (1/1) ... [2024-09-13 09:58:39,023 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 09:58:39,162 WARN L247 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] [2024-09-13 09:58:39,178 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 09:58:39,190 INFO L200 MainTranslator]: Completed pre-run [2024-09-13 09:58:39,201 WARN L247 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] [2024-09-13 09:58:39,213 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 09:58:39,228 INFO L204 MainTranslator]: Completed translation [2024-09-13 09:58:39,229 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:58:39 WrapperNode [2024-09-13 09:58:39,229 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 09:58:39,230 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 09:58:39,230 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 09:58:39,230 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 09:58:39,237 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:58:39" (1/1) ... [2024-09-13 09:58:39,244 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:58:39" (1/1) ... [2024-09-13 09:58:39,251 INFO L138 Inliner]: procedures = 17, calls = 90, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-13 09:58:39,252 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 09:58:39,252 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 09:58:39,252 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 09:58:39,253 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 09:58:39,263 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:58:39" (1/1) ... [2024-09-13 09:58:39,263 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:58:39" (1/1) ... [2024-09-13 09:58:39,265 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:58:39" (1/1) ... [2024-09-13 09:58:39,281 INFO L175 MemorySlicer]: Split 56 memory accesses to 8 slices as follows [2, 6, 8, 8, 12, 9, 5, 6]. 21 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 0, 0, 8, 0, 0, 0, 0]. The 12 writes are split as follows [0, 1, 2, 0, 3, 3, 1, 2]. [2024-09-13 09:58:39,282 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:58:39" (1/1) ... [2024-09-13 09:58:39,282 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:58:39" (1/1) ... [2024-09-13 09:58:39,297 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:58:39" (1/1) ... [2024-09-13 09:58:39,299 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:58:39" (1/1) ... [2024-09-13 09:58:39,301 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:58:39" (1/1) ... [2024-09-13 09:58:39,302 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:58:39" (1/1) ... [2024-09-13 09:58:39,305 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 09:58:39,306 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 09:58:39,306 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 09:58:39,306 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 09:58:39,307 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:58:39" (1/1) ... [2024-09-13 09:58:39,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 09:58:39,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:58:39,338 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) [2024-09-13 09:58:39,341 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 [2024-09-13 09:58:39,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 09:58:39,376 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_40_to_50_0 [2024-09-13 09:58:39,377 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_40_to_50_0 [2024-09-13 09:58:39,377 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-13 09:58:39,377 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-13 09:58:39,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-13 09:58:39,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-13 09:58:39,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-13 09:58:39,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-13 09:58:39,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-13 09:58:39,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-13 09:58:39,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-13 09:58:39,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-09-13 09:58:39,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-13 09:58:39,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-13 09:58:39,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-13 09:58:39,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-13 09:58:39,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-13 09:58:39,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-13 09:58:39,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-13 09:58:39,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-13 09:58:39,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-09-13 09:58:39,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-13 09:58:39,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-13 09:58:39,394 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_30_to_37_0 [2024-09-13 09:58:39,394 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_30_to_37_0 [2024-09-13 09:58:39,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 09:58:39,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 09:58:39,394 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-13 09:58:39,394 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-13 09:58:39,394 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-13 09:58:39,394 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-13 09:58:39,395 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-13 09:58:39,395 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-13 09:58:39,395 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-13 09:58:39,395 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-09-13 09:58:39,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-13 09:58:39,395 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-13 09:58:39,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-13 09:58:39,493 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 09:58:39,495 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 09:58:39,771 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-13 09:58:39,772 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 09:58:39,800 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 09:58:39,801 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-13 09:58:39,801 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 09:58:39 BoogieIcfgContainer [2024-09-13 09:58:39,801 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 09:58:39,803 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 09:58:39,803 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 09:58:39,806 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 09:58:39,806 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 09:58:38" (1/3) ... [2024-09-13 09:58:39,807 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b1a5b4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 09:58:39, skipping insertion in model container [2024-09-13 09:58:39,807 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:58:39" (2/3) ... [2024-09-13 09:58:39,807 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b1a5b4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 09:58:39, skipping insertion in model container [2024-09-13 09:58:39,807 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 09:58:39" (3/3) ... [2024-09-13 09:58:39,808 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_hard2.c [2024-09-13 09:58:39,822 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 09:58:39,822 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-13 09:58:39,885 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 09:58:39,895 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;@4cb75a52, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 09:58:39,895 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-13 09:58:39,900 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) [2024-09-13 09:58:39,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-13 09:58:39,907 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:58:39,908 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:58:39,908 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:58:39,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:39,915 INFO L85 PathProgramCache]: Analyzing trace with hash -237389290, now seen corresponding path program 1 times [2024-09-13 09:58:39,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:58:39,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265317852] [2024-09-13 09:58:39,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:58:39,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:58:40,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:40,482 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:58:40,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:40,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 09:58:40,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:58:40,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265317852] [2024-09-13 09:58:40,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265317852] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:58:40,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:58:40,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-13 09:58:40,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388284222] [2024-09-13 09:58:40,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:58:40,509 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 09:58:40,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:58:40,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 09:58:40,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-13 09:58:40,572 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) [2024-09-13 09:58:40,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:58:40,807 INFO L93 Difference]: Finished difference Result 86 states and 122 transitions. [2024-09-13 09:58:40,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-13 09:58:40,809 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 [2024-09-13 09:58:40,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:58:40,815 INFO L225 Difference]: With dead ends: 86 [2024-09-13 09:58:40,815 INFO L226 Difference]: Without dead ends: 44 [2024-09-13 09:58:40,818 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 [2024-09-13 09:58:40,822 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 [2024-09-13 09:58:40,823 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] [2024-09-13 09:58:40,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-09-13 09:58:40,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-09-13 09:58:40,861 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) [2024-09-13 09:58:40,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2024-09-13 09:58:40,868 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 12 [2024-09-13 09:58:40,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:58:40,870 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2024-09-13 09:58:40,871 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) [2024-09-13 09:58:40,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:40,871 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2024-09-13 09:58:40,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-13 09:58:40,873 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:58:40,873 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:58:40,873 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 09:58:40,873 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:58:40,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:40,874 INFO L85 PathProgramCache]: Analyzing trace with hash -603068878, now seen corresponding path program 1 times [2024-09-13 09:58:40,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:58:40,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663325088] [2024-09-13 09:58:40,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:58:40,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:58:40,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:41,181 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:58:41,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:41,187 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-13 09:58:41,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:41,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 09:58:41,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:58:41,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663325088] [2024-09-13 09:58:41,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663325088] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:58:41,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:58:41,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-13 09:58:41,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27134450] [2024-09-13 09:58:41,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:58:41,197 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 09:58:41,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:58:41,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 09:58:41,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-13 09:58:41,199 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) [2024-09-13 09:58:41,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:58:41,382 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2024-09-13 09:58:41,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-13 09:58:41,383 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 [2024-09-13 09:58:41,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:58:41,385 INFO L225 Difference]: With dead ends: 50 [2024-09-13 09:58:41,386 INFO L226 Difference]: Without dead ends: 48 [2024-09-13 09:58:41,386 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 [2024-09-13 09:58:41,388 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 [2024-09-13 09:58:41,389 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] [2024-09-13 09:58:41,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-13 09:58:41,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-09-13 09:58:41,410 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) [2024-09-13 09:58:41,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2024-09-13 09:58:41,411 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 18 [2024-09-13 09:58:41,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:58:41,412 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2024-09-13 09:58:41,412 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) [2024-09-13 09:58:41,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:41,414 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2024-09-13 09:58:41,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-13 09:58:41,417 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:58:41,417 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] [2024-09-13 09:58:41,417 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-13 09:58:41,418 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:58:41,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:41,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1373219252, now seen corresponding path program 1 times [2024-09-13 09:58:41,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:58:41,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024158419] [2024-09-13 09:58:41,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:58:41,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:58:41,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:58:41,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [716455395] [2024-09-13 09:58:41,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:58:41,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:58:41,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:58:41,463 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) [2024-09-13 09:58:41,465 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 09:58:41,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:41,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-13 09:58:41,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:58:41,660 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 [2024-09-13 09:58:41,668 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 [2024-09-13 09:58:41,677 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 [2024-09-13 09:58:42,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 09:58:42,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:58:42,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 09:58:42,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:58:42,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024158419] [2024-09-13 09:58:42,285 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:58:42,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716455395] [2024-09-13 09:58:42,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716455395] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-13 09:58:42,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:58:42,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-09-13 09:58:42,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609060508] [2024-09-13 09:58:42,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:58:42,288 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 09:58:42,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:58:42,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 09:58:42,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-13 09:58:42,289 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) [2024-09-13 09:58:42,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:58:42,531 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2024-09-13 09:58:42,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 09:58:42,531 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 [2024-09-13 09:58:42,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:58:42,534 INFO L225 Difference]: With dead ends: 59 [2024-09-13 09:58:42,534 INFO L226 Difference]: Without dead ends: 57 [2024-09-13 09:58:42,534 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 [2024-09-13 09:58:42,535 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 [2024-09-13 09:58:42,536 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] [2024-09-13 09:58:42,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-13 09:58:42,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2024-09-13 09:58:42,557 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) [2024-09-13 09:58:42,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2024-09-13 09:58:42,560 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 24 [2024-09-13 09:58:42,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:58:42,560 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2024-09-13 09:58:42,560 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) [2024-09-13 09:58:42,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:42,561 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2024-09-13 09:58:42,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-13 09:58:42,563 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:58:42,563 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] [2024-09-13 09:58:42,582 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-13 09:58:42,764 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 [2024-09-13 09:58:42,764 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:58:42,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:42,765 INFO L85 PathProgramCache]: Analyzing trace with hash 257250778, now seen corresponding path program 1 times [2024-09-13 09:58:42,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:58:42,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996376885] [2024-09-13 09:58:42,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:58:42,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:58:42,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:58:42,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1099827606] [2024-09-13 09:58:42,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:58:42,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:58:42,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:58:42,820 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) [2024-09-13 09:58:42,822 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 09:58:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:42,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-09-13 09:58:42,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:58:42,964 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 [2024-09-13 09:58:42,969 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 [2024-09-13 09:58:42,975 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 [2024-09-13 09:58:42,979 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 [2024-09-13 09:58:43,296 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 [2024-09-13 09:58:43,299 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 [2024-09-13 09:58:43,332 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 09:58:43,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:58:43,529 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 09:58:43,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:58:43,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996376885] [2024-09-13 09:58:43,530 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:58:43,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099827606] [2024-09-13 09:58:43,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099827606] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-13 09:58:43,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:58:43,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-09-13 09:58:43,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343111688] [2024-09-13 09:58:43,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:58:43,531 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 09:58:43,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:58:43,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 09:58:43,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-13 09:58:43,532 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) [2024-09-13 09:58:43,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:58:43,741 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2024-09-13 09:58:43,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 09:58:43,742 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 [2024-09-13 09:58:43,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:58:43,744 INFO L225 Difference]: With dead ends: 72 [2024-09-13 09:58:43,744 INFO L226 Difference]: Without dead ends: 70 [2024-09-13 09:58:43,745 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-09-13 09:58:43,746 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 19 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:58:43,746 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 252 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:58:43,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-09-13 09:58:43,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2024-09-13 09:58:43,766 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) [2024-09-13 09:58:43,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2024-09-13 09:58:43,768 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 36 [2024-09-13 09:58:43,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:58:43,768 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2024-09-13 09:58:43,768 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) [2024-09-13 09:58:43,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:43,769 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2024-09-13 09:58:43,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-13 09:58:43,770 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:58:43,772 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] [2024-09-13 09:58:43,792 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-13 09:58:43,976 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 [2024-09-13 09:58:43,977 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:58:43,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:43,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1949399703, now seen corresponding path program 1 times [2024-09-13 09:58:43,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:58:43,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844738501] [2024-09-13 09:58:43,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:58:43,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:58:44,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:58:44,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2071051801] [2024-09-13 09:58:44,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:58:44,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:58:44,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:58:44,009 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) [2024-09-13 09:58:44,011 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-13 09:58:44,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:44,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-09-13 09:58:44,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:58:44,153 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 [2024-09-13 09:58:44,157 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 [2024-09-13 09:58:44,161 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 [2024-09-13 09:58:44,455 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 09:58:44,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:58:46,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:58:46,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844738501] [2024-09-13 09:58:46,383 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:58:46,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071051801] [2024-09-13 09:58:46,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071051801] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:58:46,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:58:46,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-09-13 09:58:46,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295511499] [2024-09-13 09:58:46,384 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:58:46,384 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-13 09:58:46,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:58:46,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-13 09:58:46,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-09-13 09:58:46,385 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) [2024-09-13 09:58:46,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:58:46,920 INFO L93 Difference]: Finished difference Result 126 states and 143 transitions. [2024-09-13 09:58:46,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-13 09:58:46,920 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 [2024-09-13 09:58:46,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:58:46,922 INFO L225 Difference]: With dead ends: 126 [2024-09-13 09:58:46,923 INFO L226 Difference]: Without dead ends: 124 [2024-09-13 09:58:46,924 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2024-09-13 09:58:46,924 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 84 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 09:58:46,925 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 132 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 09:58:46,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-09-13 09:58:46,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2024-09-13 09:58:46,978 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) [2024-09-13 09:58:46,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 140 transitions. [2024-09-13 09:58:46,979 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 140 transitions. Word has length 42 [2024-09-13 09:58:46,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:58:46,979 INFO L474 AbstractCegarLoop]: Abstraction has 122 states and 140 transitions. [2024-09-13 09:58:46,979 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) [2024-09-13 09:58:46,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:46,980 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 140 transitions. [2024-09-13 09:58:46,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-13 09:58:46,983 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:58:46,984 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] [2024-09-13 09:58:47,001 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-13 09:58:47,187 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 [2024-09-13 09:58:47,188 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:58:47,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:47,188 INFO L85 PathProgramCache]: Analyzing trace with hash -605627993, now seen corresponding path program 1 times [2024-09-13 09:58:47,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:58:47,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165770931] [2024-09-13 09:58:47,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:58:47,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:58:47,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:58:47,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [616510254] [2024-09-13 09:58:47,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:58:47,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:58:47,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:58:47,228 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) [2024-09-13 09:58:47,229 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-13 09:58:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:47,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-13 09:58:47,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:58:47,359 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 [2024-09-13 09:58:47,363 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 [2024-09-13 09:58:47,368 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 [2024-09-13 09:58:47,582 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 [2024-09-13 09:58:47,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 09:58:47,660 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 [2024-09-13 09:58:47,697 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-13 09:58:47,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:58:51,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:58:51,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165770931] [2024-09-13 09:58:51,892 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:58:51,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616510254] [2024-09-13 09:58:51,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616510254] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:58:51,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:58:51,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-09-13 09:58:51,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387768536] [2024-09-13 09:58:51,893 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:58:51,893 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-13 09:58:51,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:58:51,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-13 09:58:51,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=105, Unknown=1, NotChecked=0, Total=132 [2024-09-13 09:58:51,894 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) [2024-09-13 09:58:52,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:58:52,321 INFO L93 Difference]: Finished difference Result 140 states and 159 transitions. [2024-09-13 09:58:52,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 09:58:52,322 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 [2024-09-13 09:58:52,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:58:52,323 INFO L225 Difference]: With dead ends: 140 [2024-09-13 09:58:52,323 INFO L226 Difference]: Without dead ends: 136 [2024-09-13 09:58:52,324 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=55, Invalid=184, Unknown=1, NotChecked=0, Total=240 [2024-09-13 09:58:52,324 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 57 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 09:58:52,325 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 88 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 09:58:52,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-09-13 09:58:52,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2024-09-13 09:58:52,378 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) [2024-09-13 09:58:52,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 150 transitions. [2024-09-13 09:58:52,384 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 150 transitions. Word has length 52 [2024-09-13 09:58:52,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:58:52,384 INFO L474 AbstractCegarLoop]: Abstraction has 132 states and 150 transitions. [2024-09-13 09:58:52,385 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) [2024-09-13 09:58:52,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:52,385 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 150 transitions. [2024-09-13 09:58:52,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-13 09:58:52,389 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:58:52,389 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] [2024-09-13 09:58:52,406 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-13 09:58:52,590 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 [2024-09-13 09:58:52,590 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:58:52,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:52,591 INFO L85 PathProgramCache]: Analyzing trace with hash -649217709, now seen corresponding path program 1 times [2024-09-13 09:58:52,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:58:52,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786261848] [2024-09-13 09:58:52,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:58:52,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:58:52,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:52,891 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:58:52,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:52,903 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:58:52,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:52,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:58:52,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:52,941 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-13 09:58:52,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:52,945 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-13 09:58:52,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:52,950 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 09:58:52,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:52,955 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-13 09:58:52,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:52,959 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-13 09:58:52,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:58:52,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786261848] [2024-09-13 09:58:52,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786261848] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:58:52,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:58:52,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-13 09:58:52,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097529661] [2024-09-13 09:58:52,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:58:52,960 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 09:58:52,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:58:52,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 09:58:52,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-13 09:58:52,962 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) [2024-09-13 09:58:53,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:58:53,209 INFO L93 Difference]: Finished difference Result 180 states and 207 transitions. [2024-09-13 09:58:53,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-13 09:58:53,209 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 [2024-09-13 09:58:53,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:58:53,211 INFO L225 Difference]: With dead ends: 180 [2024-09-13 09:58:53,211 INFO L226 Difference]: Without dead ends: 132 [2024-09-13 09:58:53,211 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 [2024-09-13 09:58:53,212 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 36 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2024-09-13 09:58:53,212 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] [2024-09-13 09:58:53,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-09-13 09:58:53,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2024-09-13 09:58:53,262 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) [2024-09-13 09:58:53,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 144 transitions. [2024-09-13 09:58:53,264 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 144 transitions. Word has length 53 [2024-09-13 09:58:53,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:58:53,264 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 144 transitions. [2024-09-13 09:58:53,265 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) [2024-09-13 09:58:53,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:53,265 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 144 transitions. [2024-09-13 09:58:53,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-13 09:58:53,269 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:58:53,270 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] [2024-09-13 09:58:53,270 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-13 09:58:53,270 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:58:53,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:53,271 INFO L85 PathProgramCache]: Analyzing trace with hash 217789429, now seen corresponding path program 1 times [2024-09-13 09:58:53,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:58:53,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54486031] [2024-09-13 09:58:53,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:58:53,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:58:53,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:53,515 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:58:53,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:53,527 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:58:53,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:53,558 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:58:53,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:53,561 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-13 09:58:53,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:53,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-13 09:58:53,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:53,590 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 09:58:53,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:53,613 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:58:53,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:53,616 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-13 09:58:53,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:53,620 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-13 09:58:53,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:53,625 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-13 09:58:53,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:58:53,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54486031] [2024-09-13 09:58:53,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54486031] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:58:53,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:58:53,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-13 09:58:53,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021215258] [2024-09-13 09:58:53,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:58:53,629 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-13 09:58:53,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:58:53,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-13 09:58:53,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-09-13 09:58:53,630 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) [2024-09-13 09:58:53,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:58:53,864 INFO L93 Difference]: Finished difference Result 134 states and 148 transitions. [2024-09-13 09:58:53,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-13 09:58:53,865 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 [2024-09-13 09:58:53,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:58:53,867 INFO L225 Difference]: With dead ends: 134 [2024-09-13 09:58:53,867 INFO L226 Difference]: Without dead ends: 102 [2024-09-13 09:58:53,867 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 [2024-09-13 09:58:53,869 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 45 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2024-09-13 09:58:53,869 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] [2024-09-13 09:58:53,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-09-13 09:58:53,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2024-09-13 09:58:53,902 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) [2024-09-13 09:58:53,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 113 transitions. [2024-09-13 09:58:53,903 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 113 transitions. Word has length 58 [2024-09-13 09:58:53,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:58:53,903 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 113 transitions. [2024-09-13 09:58:53,903 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) [2024-09-13 09:58:53,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:53,904 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 113 transitions. [2024-09-13 09:58:53,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-13 09:58:53,906 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:58:53,906 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] [2024-09-13 09:58:53,906 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-09-13 09:58:53,906 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:58:53,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:53,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1027870564, now seen corresponding path program 1 times [2024-09-13 09:58:53,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:58:53,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165258590] [2024-09-13 09:58:53,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:58:53,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:58:53,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:58:53,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1530392029] [2024-09-13 09:58:53,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:58:53,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:58:53,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:58:53,952 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) [2024-09-13 09:58:53,953 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-13 09:58:54,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:54,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-09-13 09:58:54,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:58:54,100 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 [2024-09-13 09:58:54,104 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 [2024-09-13 09:58:54,108 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 [2024-09-13 09:58:54,471 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 [2024-09-13 09:58:54,481 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 [2024-09-13 09:58:54,720 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-13 09:58:54,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:58:55,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:58:55,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165258590] [2024-09-13 09:58:55,052 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:58:55,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530392029] [2024-09-13 09:58:55,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530392029] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:58:55,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:58:55,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2024-09-13 09:58:55,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180743818] [2024-09-13 09:58:55,053 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:58:55,053 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-13 09:58:55,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:58:55,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-13 09:58:55,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-09-13 09:58:55,054 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) [2024-09-13 09:58:55,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:58:55,774 INFO L93 Difference]: Finished difference Result 134 states and 152 transitions. [2024-09-13 09:58:55,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-13 09:58:55,775 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 [2024-09-13 09:58:55,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:58:55,776 INFO L225 Difference]: With dead ends: 134 [2024-09-13 09:58:55,776 INFO L226 Difference]: Without dead ends: 132 [2024-09-13 09:58:55,777 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 [2024-09-13 09:58:55,777 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 67 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 31 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-13 09:58:55,777 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 136 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 390 Invalid, 2 Unknown, 0 Unchecked, 0.5s Time] [2024-09-13 09:58:55,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-09-13 09:58:55,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2024-09-13 09:58:55,823 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) [2024-09-13 09:58:55,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 149 transitions. [2024-09-13 09:58:55,825 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 149 transitions. Word has length 66 [2024-09-13 09:58:55,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:58:55,827 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 149 transitions. [2024-09-13 09:58:55,827 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) [2024-09-13 09:58:55,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:55,828 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 149 transitions. [2024-09-13 09:58:55,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-09-13 09:58:55,828 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:58:55,829 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] [2024-09-13 09:58:55,848 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-13 09:58:56,029 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 [2024-09-13 09:58:56,029 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:58:56,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:56,030 INFO L85 PathProgramCache]: Analyzing trace with hash -409790049, now seen corresponding path program 2 times [2024-09-13 09:58:56,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:58:56,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473584120] [2024-09-13 09:58:56,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:58:56,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:58:56,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:58:56,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2028229075] [2024-09-13 09:58:56,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 09:58:56,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:58:56,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:58:56,092 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) [2024-09-13 09:58:56,094 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-13 09:58:56,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 09:58:56,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:58:56,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-09-13 09:58:56,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:58:56,273 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 [2024-09-13 09:58:56,280 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 [2024-09-13 09:58:56,285 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 [2024-09-13 09:58:56,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 09:58:56,885 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 [2024-09-13 09:58:57,132 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 36 proven. 43 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-09-13 09:58:57,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:58:57,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:58:57,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473584120] [2024-09-13 09:58:57,789 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:58:57,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028229075] [2024-09-13 09:58:57,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028229075] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:58:57,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:58:57,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-13 09:58:57,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178975124] [2024-09-13 09:58:57,789 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:58:57,790 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-13 09:58:57,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:58:57,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-13 09:58:57,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2024-09-13 09:58:57,791 INFO L87 Difference]: Start difference. First operand 130 states and 149 transitions. Second operand has 16 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 9 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-13 09:58:58,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:58:58,842 INFO L93 Difference]: Finished difference Result 162 states and 185 transitions. [2024-09-13 09:58:58,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-13 09:58:58,843 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 9 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 90 [2024-09-13 09:58:58,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:58:58,844 INFO L225 Difference]: With dead ends: 162 [2024-09-13 09:58:58,845 INFO L226 Difference]: Without dead ends: 160 [2024-09-13 09:58:58,845 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2024-09-13 09:58:58,846 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 55 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 23 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-13 09:58:58,846 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 244 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 735 Invalid, 2 Unknown, 0 Unchecked, 0.8s Time] [2024-09-13 09:58:58,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-09-13 09:58:58,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 132. [2024-09-13 09:58:58,885 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) [2024-09-13 09:58:58,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 152 transitions. [2024-09-13 09:58:58,886 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 152 transitions. Word has length 90 [2024-09-13 09:58:58,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:58:58,886 INFO L474 AbstractCegarLoop]: Abstraction has 132 states and 152 transitions. [2024-09-13 09:58:58,887 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 9 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-13 09:58:58,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:58,887 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 152 transitions. [2024-09-13 09:58:58,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-09-13 09:58:58,888 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:58:58,888 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] [2024-09-13 09:58:58,907 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-13 09:58:59,089 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 [2024-09-13 09:58:59,089 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:58:59,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:59,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1410569242, now seen corresponding path program 3 times [2024-09-13 09:58:59,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:58:59,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211059486] [2024-09-13 09:58:59,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:58:59,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:58:59,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:58:59,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1892524919] [2024-09-13 09:58:59,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 09:58:59,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:58:59,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:58:59,150 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) [2024-09-13 09:58:59,151 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-13 09:58:59,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-13 09:58:59,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:58:59,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 146 conjuncts are in the unsatisfiable core [2024-09-13 09:58:59,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:58:59,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 09:58:59,417 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 [2024-09-13 09:58:59,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 09:59:00,170 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 [2024-09-13 09:59:00,174 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 [2024-09-13 09:59:00,440 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 48 proven. 64 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2024-09-13 09:59:00,441 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:59:01,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:59:01,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211059486] [2024-09-13 09:59:01,477 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:59:01,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892524919] [2024-09-13 09:59:01,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892524919] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:59:01,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:59:01,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-13 09:59:01,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558237810] [2024-09-13 09:59:01,478 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:59:01,478 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-13 09:59:01,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:59:01,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-13 09:59:01,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2024-09-13 09:59:01,479 INFO L87 Difference]: Start difference. First operand 132 states and 152 transitions. Second operand has 18 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 15 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) [2024-09-13 09:59:02,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:59:02,767 INFO L93 Difference]: Finished difference Result 164 states and 188 transitions. [2024-09-13 09:59:02,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-13 09:59:02,768 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 15 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 [2024-09-13 09:59:02,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:59:02,769 INFO L225 Difference]: With dead ends: 164 [2024-09-13 09:59:02,769 INFO L226 Difference]: Without dead ends: 162 [2024-09-13 09:59:02,770 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2024-09-13 09:59:02,770 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 44 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 22 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:59:02,770 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 279 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 847 Invalid, 2 Unknown, 0 Unchecked, 1.0s Time] [2024-09-13 09:59:02,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-09-13 09:59:02,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 134. [2024-09-13 09:59:02,808 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) [2024-09-13 09:59:02,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 155 transitions. [2024-09-13 09:59:02,810 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 155 transitions. Word has length 114 [2024-09-13 09:59:02,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:59:02,810 INFO L474 AbstractCegarLoop]: Abstraction has 134 states and 155 transitions. [2024-09-13 09:59:02,810 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 15 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) [2024-09-13 09:59:02,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:59:02,810 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 155 transitions. [2024-09-13 09:59:02,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-09-13 09:59:02,812 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:59:02,812 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] [2024-09-13 09:59:02,830 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-13 09:59:03,012 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 [2024-09-13 09:59:03,013 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:59:03,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:59:03,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1625386709, now seen corresponding path program 4 times [2024-09-13 09:59:03,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:59:03,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550460896] [2024-09-13 09:59:03,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:59:03,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:59:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:59:03,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [919139307] [2024-09-13 09:59:03,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 09:59:03,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:59:03,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:59:03,073 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) [2024-09-13 09:59:03,075 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-13 09:59:03,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 09:59:03,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:59:03,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 164 conjuncts are in the unsatisfiable core [2024-09-13 09:59:03,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:59:03,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2024-09-13 09:59:03,896 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 41 treesize of output 29 [2024-09-13 09:59:04,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2024-09-13 09:59:04,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 09:59:04,771 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 42 treesize of output 30 [2024-09-13 09:59:04,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2024-09-13 09:59:04,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-09-13 09:59:05,049 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 123 proven. 67 refuted. 0 times theorem prover too weak. 438 trivial. 0 not checked. [2024-09-13 09:59:05,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:59:10,676 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 09:59:10,676 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 100 treesize of output 99 [2024-09-13 09:59:10,687 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 09:59:10,687 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 124 treesize of output 115 [2024-09-13 09:59:11,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:59:11,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550460896] [2024-09-13 09:59:11,058 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:59:11,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919139307] [2024-09-13 09:59:11,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919139307] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:59:11,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:59:11,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-13 09:59:11,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583172517] [2024-09-13 09:59:11,059 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:59:11,059 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-13 09:59:11,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:59:11,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-13 09:59:11,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2024-09-13 09:59:11,060 INFO L87 Difference]: Start difference. First operand 134 states and 155 transitions. Second operand has 17 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 8 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2024-09-13 09:59:20,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 09:59:20,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:59:20,559 INFO L93 Difference]: Finished difference Result 163 states and 184 transitions. [2024-09-13 09:59:20,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-13 09:59:20,559 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 8 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) Word has length 138 [2024-09-13 09:59:20,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:59:20,561 INFO L225 Difference]: With dead ends: 163 [2024-09-13 09:59:20,561 INFO L226 Difference]: Without dead ends: 161 [2024-09-13 09:59:20,561 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=218, Invalid=1421, Unknown=1, NotChecked=0, Total=1640 [2024-09-13 09:59:20,562 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 61 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 49 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2024-09-13 09:59:20,562 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 221 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 588 Invalid, 3 Unknown, 0 Unchecked, 6.7s Time] [2024-09-13 09:59:20,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-09-13 09:59:20,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 127. [2024-09-13 09:59:20,614 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) [2024-09-13 09:59:20,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 142 transitions. [2024-09-13 09:59:20,615 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 142 transitions. Word has length 138 [2024-09-13 09:59:20,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:59:20,615 INFO L474 AbstractCegarLoop]: Abstraction has 127 states and 142 transitions. [2024-09-13 09:59:20,615 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 8 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2024-09-13 09:59:20,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:59:20,616 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 142 transitions. [2024-09-13 09:59:20,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-09-13 09:59:20,616 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:59:20,616 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] [2024-09-13 09:59:20,624 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-13 09:59:20,817 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 [2024-09-13 09:59:20,818 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:59:20,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:59:20,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1593861602, now seen corresponding path program 1 times [2024-09-13 09:59:20,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:59:20,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52585087] [2024-09-13 09:59:20,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:59:20,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:59:20,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:59:21,035 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:59:21,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:59:21,044 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:59:21,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:59:21,162 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:59:21,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:59:21,167 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-13 09:59:21,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:59:21,170 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-13 09:59:21,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:59:21,174 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 09:59:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:59:21,203 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:59:21,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:59:21,207 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-13 09:59:21,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:59:21,210 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-13 09:59:21,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:59:21,224 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-13 09:59:21,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:59:21,295 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:59:21,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:59:21,299 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-13 09:59:21,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:59:21,304 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-09-13 09:59:21,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:59:21,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52585087] [2024-09-13 09:59:21,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52585087] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:59:21,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393807242] [2024-09-13 09:59:21,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:59:21,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:59:21,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:59:21,310 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) [2024-09-13 09:59:21,312 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-13 09:59:21,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:59:21,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-13 09:59:21,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:59:21,479 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 15 treesize of output 1 [2024-09-13 09:59:21,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-09-13 09:59:21,635 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-09-13 09:59:21,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:59:21,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-13 09:59:21,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393807242] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:59:21,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 09:59:21,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2024-09-13 09:59:21,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936432422] [2024-09-13 09:59:21,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 09:59:21,935 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-13 09:59:21,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:59:21,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-13 09:59:21,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2024-09-13 09:59:21,936 INFO L87 Difference]: Start difference. First operand 127 states and 142 transitions. Second operand has 18 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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) [2024-09-13 09:59:22,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:59:22,375 INFO L93 Difference]: Finished difference Result 132 states and 150 transitions. [2024-09-13 09:59:22,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-13 09:59:22,376 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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 [2024-09-13 09:59:22,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:59:22,378 INFO L225 Difference]: With dead ends: 132 [2024-09-13 09:59:22,378 INFO L226 Difference]: Without dead ends: 120 [2024-09-13 09:59:22,378 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2024-09-13 09:59:22,379 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 67 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 09:59:22,379 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 96 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 09:59:22,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-09-13 09:59:22,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2024-09-13 09:59:22,417 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) [2024-09-13 09:59:22,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 130 transitions. [2024-09-13 09:59:22,418 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 130 transitions. Word has length 76 [2024-09-13 09:59:22,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:59:22,418 INFO L474 AbstractCegarLoop]: Abstraction has 117 states and 130 transitions. [2024-09-13 09:59:22,418 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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) [2024-09-13 09:59:22,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:59:22,418 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 130 transitions. [2024-09-13 09:59:22,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-09-13 09:59:22,419 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:59:22,419 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] [2024-09-13 09:59:22,432 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-13 09:59:22,619 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 [2024-09-13 09:59:22,620 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:59:22,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:59:22,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1184517000, now seen corresponding path program 1 times [2024-09-13 09:59:22,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:59:22,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902180194] [2024-09-13 09:59:22,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:59:22,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:59:22,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:59:22,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [580753098] [2024-09-13 09:59:22,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:59:22,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:59:22,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:59:22,660 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) [2024-09-13 09:59:22,662 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-13 09:59:22,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:59:22,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 203 conjuncts are in the unsatisfiable core [2024-09-13 09:59:22,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:59:22,885 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 [2024-09-13 09:59:22,889 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 [2024-09-13 09:59:22,894 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 [2024-09-13 09:59:22,902 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 [2024-09-13 09:59:22,908 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 [2024-09-13 09:59:22,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 09:59:23,543 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 [2024-09-13 09:59:23,551 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 [2024-09-13 09:59:24,236 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 [2024-09-13 09:59:24,248 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 [2024-09-13 09:59:24,306 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-13 09:59:24,306 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 [2024-09-13 09:59:24,347 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-09-13 09:59:24,348 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 [2024-09-13 09:59:24,654 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 09:59:24,654 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 [2024-09-13 09:59:24,702 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 09:59:24,703 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 [2024-09-13 09:59:24,881 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 57 proven. 35 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-09-13 09:59:24,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:59:27,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:59:27,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902180194] [2024-09-13 09:59:27,305 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:59:27,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580753098] [2024-09-13 09:59:27,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580753098] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:59:27,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:59:27,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-13 09:59:27,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28177745] [2024-09-13 09:59:27,306 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:59:27,306 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-13 09:59:27,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:59:27,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-13 09:59:27,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2024-09-13 09:59:27,308 INFO L87 Difference]: Start difference. First operand 117 states and 130 transitions. Second operand has 23 states, 18 states have (on average 2.0) internal successors, (36), 19 states have internal predecessors, (36), 10 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-13 09:59:29,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:59:29,285 INFO L93 Difference]: Finished difference Result 159 states and 186 transitions. [2024-09-13 09:59:29,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-13 09:59:29,286 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 2.0) internal successors, (36), 19 states have internal predecessors, (36), 10 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 77 [2024-09-13 09:59:29,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:59:29,287 INFO L225 Difference]: With dead ends: 159 [2024-09-13 09:59:29,287 INFO L226 Difference]: Without dead ends: 157 [2024-09-13 09:59:29,288 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 65 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=205, Invalid=1687, Unknown=0, NotChecked=0, Total=1892 [2024-09-13 09:59:29,288 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 54 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 28 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:59:29,289 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 279 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 925 Invalid, 2 Unknown, 0 Unchecked, 1.1s Time] [2024-09-13 09:59:29,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-09-13 09:59:29,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 153. [2024-09-13 09:59:29,357 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) [2024-09-13 09:59:29,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 175 transitions. [2024-09-13 09:59:29,358 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 175 transitions. Word has length 77 [2024-09-13 09:59:29,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:59:29,358 INFO L474 AbstractCegarLoop]: Abstraction has 153 states and 175 transitions. [2024-09-13 09:59:29,358 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 2.0) internal successors, (36), 19 states have internal predecessors, (36), 10 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-13 09:59:29,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:59:29,358 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 175 transitions. [2024-09-13 09:59:29,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-09-13 09:59:29,359 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:59:29,359 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] [2024-09-13 09:59:29,374 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-13 09:59:29,560 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 [2024-09-13 09:59:29,560 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:59:29,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:59:29,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1910667427, now seen corresponding path program 2 times [2024-09-13 09:59:29,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:59:29,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916258225] [2024-09-13 09:59:29,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:59:29,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:59:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:59:29,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1825828604] [2024-09-13 09:59:29,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 09:59:29,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:59:29,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:59:29,613 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) [2024-09-13 09:59:29,614 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-13 09:59:29,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 09:59:29,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:59:29,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 245 conjuncts are in the unsatisfiable core [2024-09-13 09:59:29,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:59:29,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 09:59:29,859 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 15 treesize of output 11 [2024-09-13 09:59:29,865 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 [2024-09-13 09:59:29,872 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 [2024-09-13 09:59:29,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 09:59:29,883 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 [2024-09-13 09:59:31,157 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 [2024-09-13 09:59:31,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 09:59:31,715 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 [2024-09-13 09:59:31,727 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 [2024-09-13 09:59:31,864 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-09-13 09:59:31,865 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 [2024-09-13 09:59:31,911 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-13 09:59:31,911 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 [2024-09-13 09:59:32,222 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 09:59:32,223 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 92 treesize of output 184 [2024-09-13 09:59:32,259 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 09:59:32,259 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 [2024-09-13 09:59:32,422 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 75 proven. 77 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-09-13 09:59:32,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:59:37,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:59:37,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916258225] [2024-09-13 09:59:37,671 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:59:37,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825828604] [2024-09-13 09:59:37,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825828604] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:59:37,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:59:37,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-13 09:59:37,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798017736] [2024-09-13 09:59:37,672 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:59:37,672 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-13 09:59:37,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:59:37,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-13 09:59:37,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2024-09-13 09:59:37,673 INFO L87 Difference]: Start difference. First operand 153 states and 175 transitions. Second operand has 25 states, 19 states have (on average 2.263157894736842) internal successors, (43), 21 states have internal predecessors, (43), 13 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (15), 9 states have call predecessors, (15), 10 states have call successors, (15) [2024-09-13 09:59:40,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:59:40,545 INFO L93 Difference]: Finished difference Result 195 states and 231 transitions. [2024-09-13 09:59:40,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-13 09:59:40,545 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 2.263157894736842) internal successors, (43), 21 states have internal predecessors, (43), 13 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (15), 9 states have call predecessors, (15), 10 states have call successors, (15) Word has length 101 [2024-09-13 09:59:40,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:59:40,548 INFO L225 Difference]: With dead ends: 195 [2024-09-13 09:59:40,548 INFO L226 Difference]: Without dead ends: 193 [2024-09-13 09:59:40,550 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 87 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=225, Invalid=2325, Unknown=0, NotChecked=0, Total=2550 [2024-09-13 09:59:40,552 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 54 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 1312 mSolverCounterSat, 25 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1312 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-13 09:59:40,552 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 392 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1312 Invalid, 2 Unknown, 0 Unchecked, 1.7s Time] [2024-09-13 09:59:40,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-09-13 09:59:40,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 155. [2024-09-13 09:59:40,645 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) [2024-09-13 09:59:40,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 178 transitions. [2024-09-13 09:59:40,646 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 178 transitions. Word has length 101 [2024-09-13 09:59:40,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:59:40,646 INFO L474 AbstractCegarLoop]: Abstraction has 155 states and 178 transitions. [2024-09-13 09:59:40,647 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 2.263157894736842) internal successors, (43), 21 states have internal predecessors, (43), 13 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (15), 9 states have call predecessors, (15), 10 states have call successors, (15) [2024-09-13 09:59:40,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:59:40,647 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 178 transitions. [2024-09-13 09:59:40,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-09-13 09:59:40,650 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:59:40,650 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] [2024-09-13 09:59:40,669 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-13 09:59:40,850 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 [2024-09-13 09:59:40,851 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:59:40,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:59:40,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1396227582, now seen corresponding path program 3 times [2024-09-13 09:59:40,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:59:40,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371230336] [2024-09-13 09:59:40,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:59:40,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:59:40,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:59:40,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2141112008] [2024-09-13 09:59:40,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 09:59:40,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:59:40,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:59:40,900 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) [2024-09-13 09:59:40,901 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-13 09:59:43,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-13 09:59:43,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:59:43,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 309 conjuncts are in the unsatisfiable core [2024-09-13 09:59:43,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:59:43,197 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 [2024-09-13 09:59:43,207 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 [2024-09-13 09:59:43,216 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 [2024-09-13 09:59:43,220 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 [2024-09-13 09:59:43,227 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 [2024-09-13 09:59:43,234 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 [2024-09-13 09:59:44,940 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 [2024-09-13 09:59:44,947 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 [2024-09-13 09:59:45,643 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 [2024-09-13 09:59:45,669 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 [2024-09-13 09:59:45,749 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-09-13 09:59:45,749 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 25 [2024-09-13 09:59:45,776 INFO L349 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2024-09-13 09:59:45,777 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 43 [2024-09-13 09:59:45,990 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 09:59:45,991 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 72 treesize of output 88 [2024-09-13 09:59:46,005 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 09:59:46,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 52 [2024-09-13 09:59:46,100 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 111 proven. 97 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2024-09-13 09:59:46,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:59:53,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:59:53,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371230336] [2024-09-13 09:59:53,383 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:59:53,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141112008] [2024-09-13 09:59:53,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141112008] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:59:53,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:59:53,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-13 09:59:53,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451365250] [2024-09-13 09:59:53,386 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:59:53,387 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-13 09:59:53,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:59:53,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-13 09:59:53,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1217, Unknown=0, NotChecked=0, Total=1332 [2024-09-13 09:59:53,388 INFO L87 Difference]: Start difference. First operand 155 states and 178 transitions. Second operand has 25 states, 19 states have (on average 2.210526315789474) internal successors, (42), 21 states have internal predecessors, (42), 12 states have call successors, (18), 7 states have call predecessors, (18), 8 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2024-09-13 09:59:56,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:59:56,968 INFO L93 Difference]: Finished difference Result 197 states and 234 transitions. [2024-09-13 09:59:56,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-13 09:59:56,969 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 2.210526315789474) internal successors, (42), 21 states have internal predecessors, (42), 12 states have call successors, (18), 7 states have call predecessors, (18), 8 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) Word has length 125 [2024-09-13 09:59:56,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:59:56,970 INFO L225 Difference]: With dead ends: 197 [2024-09-13 09:59:56,971 INFO L226 Difference]: Without dead ends: 195 [2024-09-13 09:59:56,971 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 112 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=220, Invalid=2330, Unknown=0, NotChecked=0, Total=2550 [2024-09-13 09:59:56,972 INFO L434 NwaCegarLoop]: 54 mSDtfsCounter, 51 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 1422 mSolverCounterSat, 24 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 1450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1422 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-09-13 09:59:56,972 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 480 Invalid, 1450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1422 Invalid, 4 Unknown, 0 Unchecked, 1.9s Time] [2024-09-13 09:59:56,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-09-13 09:59:57,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 157. [2024-09-13 09:59:57,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 101 states have (on average 1.099009900990099) internal successors, (111), 103 states have internal predecessors, (111), 29 states have call successors, (29), 23 states have call predecessors, (29), 26 states have return successors, (41), 30 states have call predecessors, (41), 26 states have call successors, (41) [2024-09-13 09:59:57,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 181 transitions. [2024-09-13 09:59:57,059 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 181 transitions. Word has length 125 [2024-09-13 09:59:57,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:59:57,060 INFO L474 AbstractCegarLoop]: Abstraction has 157 states and 181 transitions. [2024-09-13 09:59:57,060 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 2.210526315789474) internal successors, (42), 21 states have internal predecessors, (42), 12 states have call successors, (18), 7 states have call predecessors, (18), 8 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2024-09-13 09:59:57,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:59:57,060 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 181 transitions. [2024-09-13 09:59:57,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-09-13 09:59:57,061 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:59:57,061 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:59:57,072 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-13 09:59:57,262 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-13 09:59:57,262 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:59:57,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:59:57,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1715931769, now seen corresponding path program 4 times [2024-09-13 09:59:57,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:59:57,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806712912] [2024-09-13 09:59:57,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:59:57,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:59:57,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:59:57,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [957268347] [2024-09-13 09:59:57,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 09:59:57,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:59:57,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:59:57,295 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:59:57,297 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-13 09:59:57,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 09:59:57,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:59:57,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 205 conjuncts are in the unsatisfiable core [2024-09-13 09:59:57,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:59:57,693 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 [2024-09-13 09:59:57,703 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 [2024-09-13 10:01:50,928 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 44 treesize of output 28 [2024-09-13 10:01:50,933 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 59 treesize of output 39 [2024-09-13 10:01:50,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2024-09-13 10:02:04,315 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 46 treesize of output 34 [2024-09-13 10:02:04,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2024-09-13 10:02:04,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2024-09-13 10:02:04,433 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 101 proven. 31 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-13 10:02:04,433 INFO L327 TraceCheckSpWp]: Computing backward predicates...