./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 04d6fb36 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_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-tmp.dk.referee-eval-04d6fb3-m [2024-09-15 19:56:30,408 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 19:56:30,465 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 19:56:30,470 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 19:56:30,472 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 19:56:30,496 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 19:56:30,497 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 19:56:30,498 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 19:56:30,498 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 19:56:30,499 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 19:56:30,501 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 19:56:30,501 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 19:56:30,502 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 19:56:30,502 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 19:56:30,502 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 19:56:30,502 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 19:56:30,503 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 19:56:30,503 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 19:56:30,503 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 19:56:30,503 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 19:56:30,504 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 19:56:30,506 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 19:56:30,507 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 19:56:30,507 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 19:56:30,507 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 19:56:30,507 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 19:56:30,507 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 19:56:30,507 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 19:56:30,508 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 19:56:30,508 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 19:56:30,509 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 19:56:30,509 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 19:56:30,509 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:56:30,509 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 19:56:30,509 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 19:56:30,510 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 19:56:30,510 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 19:56:30,510 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 19:56:30,516 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 19:56:30,516 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 19:56:30,516 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 19:56:30,517 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 19:56:30,517 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8571897e57404ad6e85df2c29745d5b56fa4d168673d3bc7c670c79b03a6c106 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-15 19:56:30,782 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 19:56:30,819 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 19:56:30,821 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 19:56:30,823 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 19:56:30,823 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 19:56:30,824 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.c [2024-09-15 19:56:32,214 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 19:56:32,374 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 19:56:32,375 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.c [2024-09-15 19:56:32,382 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/226558581/176eb1525a714f569b41b2b2ac51e689/FLAGdd6dc5381 [2024-09-15 19:56:32,785 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/226558581/176eb1525a714f569b41b2b2ac51e689 [2024-09-15 19:56:32,788 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 19:56:32,790 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-15 19:56:32,792 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 19:56:32,793 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 19:56:32,797 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 19:56:32,798 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:56:32" (1/1) ... [2024-09-15 19:56:32,799 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7623fe11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:56:32, skipping insertion in model container [2024-09-15 19:56:32,799 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:56:32" (1/1) ... [2024-09-15 19:56:32,817 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 19:56:32,961 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.c[1067,1080] [2024-09-15 19:56:32,984 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:56:33,003 INFO L200 MainTranslator]: Completed pre-run [2024-09-15 19:56:33,014 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.c[1067,1080] [2024-09-15 19:56:33,032 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:56:33,055 INFO L204 MainTranslator]: Completed translation [2024-09-15 19:56:33,056 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:56:33 WrapperNode [2024-09-15 19:56:33,056 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 19:56:33,058 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 19:56:33,058 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 19:56:33,058 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 19:56:33,064 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:56:33" (1/1) ... [2024-09-15 19:56:33,076 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:56:33" (1/1) ... [2024-09-15 19:56:33,084 INFO L138 Inliner]: procedures = 17, calls = 90, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-15 19:56:33,084 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 19:56:33,085 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 19:56:33,085 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 19:56:33,085 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 19:56:33,094 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:56:33" (1/1) ... [2024-09-15 19:56:33,094 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:56:33" (1/1) ... [2024-09-15 19:56:33,105 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:56:33" (1/1) ... [2024-09-15 19:56:33,129 INFO L175 MemorySlicer]: Split 56 memory accesses to 8 slices as follows [2, 8, 9, 5, 6, 6, 8, 12]. 21 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0, 0, 0, 0, 0]. The 12 writes are split as follows [0, 0, 3, 1, 2, 1, 2, 3]. [2024-09-15 19:56:33,129 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:56:33" (1/1) ... [2024-09-15 19:56:33,130 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:56:33" (1/1) ... [2024-09-15 19:56:33,139 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:56:33" (1/1) ... [2024-09-15 19:56:33,144 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:56:33" (1/1) ... [2024-09-15 19:56:33,149 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:56:33" (1/1) ... [2024-09-15 19:56:33,150 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:56:33" (1/1) ... [2024-09-15 19:56:33,153 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 19:56:33,154 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 19:56:33,154 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 19:56:33,154 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 19:56:33,155 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:56:33" (1/1) ... [2024-09-15 19:56:33,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:56:33,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:56:33,197 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-15 19:56:33,210 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-15 19:56:33,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 19:56:33,252 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_40_to_50_0 [2024-09-15 19:56:33,252 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_40_to_50_0 [2024-09-15 19:56:33,252 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-15 19:56:33,253 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-15 19:56:33,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-15 19:56:33,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-15 19:56:33,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-15 19:56:33,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-15 19:56:33,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-15 19:56:33,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-15 19:56:33,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-15 19:56:33,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-09-15 19:56:33,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-15 19:56:33,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-15 19:56:33,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-15 19:56:33,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-15 19:56:33,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-15 19:56:33,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-15 19:56:33,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-15 19:56:33,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-15 19:56:33,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-09-15 19:56:33,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-15 19:56:33,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-15 19:56:33,259 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_30_to_37_0 [2024-09-15 19:56:33,259 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_30_to_37_0 [2024-09-15 19:56:33,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 19:56:33,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 19:56:33,259 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-15 19:56:33,259 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-15 19:56:33,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-15 19:56:33,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-15 19:56:33,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-15 19:56:33,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-15 19:56:33,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-15 19:56:33,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-09-15 19:56:33,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-15 19:56:33,261 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-15 19:56:33,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-15 19:56:33,360 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 19:56:33,362 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 19:56:33,565 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-15 19:56:33,566 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 19:56:33,589 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 19:56:33,589 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-15 19:56:33,589 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:56:33 BoogieIcfgContainer [2024-09-15 19:56:33,589 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 19:56:33,593 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 19:56:33,593 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 19:56:33,595 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 19:56:33,596 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 07:56:32" (1/3) ... [2024-09-15 19:56:33,596 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49cfe417 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:56:33, skipping insertion in model container [2024-09-15 19:56:33,597 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:56:33" (2/3) ... [2024-09-15 19:56:33,597 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49cfe417 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:56:33, skipping insertion in model container [2024-09-15 19:56:33,597 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:56:33" (3/3) ... [2024-09-15 19:56:33,598 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_hard2.c [2024-09-15 19:56:33,612 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 19:56:33,612 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-15 19:56:33,683 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 19:56:33,689 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;@778f7a70, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 19:56:33,690 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-15 19:56:33,693 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) [2024-09-15 19:56:33,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-15 19:56:33,699 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:56:33,699 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:56:33,700 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:56:33,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:33,706 INFO L85 PathProgramCache]: Analyzing trace with hash -237389290, now seen corresponding path program 1 times [2024-09-15 19:56:33,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:56:33,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265251947] [2024-09-15 19:56:33,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:56:33,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:56:33,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:34,264 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:56:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:34,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:56:34,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:56:34,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265251947] [2024-09-15 19:56:34,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265251947] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:56:34,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:56:34,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-15 19:56:34,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386305470] [2024-09-15 19:56:34,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:56:34,282 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-15 19:56:34,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:56:34,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-15 19:56:34,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-15 19:56:34,306 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) [2024-09-15 19:56:34,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:56:34,513 INFO L93 Difference]: Finished difference Result 86 states and 122 transitions. [2024-09-15 19:56:34,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-15 19:56:34,515 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 [2024-09-15 19:56:34,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:56:34,521 INFO L225 Difference]: With dead ends: 86 [2024-09-15 19:56:34,521 INFO L226 Difference]: Without dead ends: 44 [2024-09-15 19:56:34,524 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 [2024-09-15 19:56:34,527 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, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:56:34,527 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 255 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:56:34,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-09-15 19:56:34,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-09-15 19:56:34,564 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) [2024-09-15 19:56:34,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2024-09-15 19:56:34,569 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 12 [2024-09-15 19:56:34,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:56:34,570 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2024-09-15 19:56:34,570 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) [2024-09-15 19:56:34,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:34,572 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2024-09-15 19:56:34,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-15 19:56:34,573 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:56:34,573 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:56:34,573 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-15 19:56:34,574 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:56:34,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:34,574 INFO L85 PathProgramCache]: Analyzing trace with hash -603068878, now seen corresponding path program 1 times [2024-09-15 19:56:34,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:56:34,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990963658] [2024-09-15 19:56:34,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:56:34,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:56:34,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:34,889 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:56:34,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:34,896 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-15 19:56:34,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:34,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:56:34,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:56:34,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990963658] [2024-09-15 19:56:34,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990963658] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:56:34,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:56:34,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-15 19:56:34,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387350939] [2024-09-15 19:56:34,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:56:34,915 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-15 19:56:34,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:56:34,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-15 19:56:34,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-15 19:56:34,918 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) [2024-09-15 19:56:35,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:56:35,071 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2024-09-15 19:56:35,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-15 19:56:35,072 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 [2024-09-15 19:56:35,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:56:35,073 INFO L225 Difference]: With dead ends: 50 [2024-09-15 19:56:35,073 INFO L226 Difference]: Without dead ends: 48 [2024-09-15 19:56:35,074 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 [2024-09-15 19:56:35,075 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 [2024-09-15 19:56:35,075 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] [2024-09-15 19:56:35,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-15 19:56:35,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-09-15 19:56:35,087 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) [2024-09-15 19:56:35,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2024-09-15 19:56:35,088 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 18 [2024-09-15 19:56:35,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:56:35,089 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2024-09-15 19:56:35,089 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) [2024-09-15 19:56:35,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:35,089 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2024-09-15 19:56:35,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-15 19:56:35,090 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:56:35,090 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] [2024-09-15 19:56:35,090 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-15 19:56:35,090 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:56:35,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:35,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1373219252, now seen corresponding path program 1 times [2024-09-15 19:56:35,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:56:35,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955726925] [2024-09-15 19:56:35,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:56:35,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:56:35,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:56:35,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1036686461] [2024-09-15 19:56:35,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:56:35,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:56:35,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:56:35,126 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:56:35,130 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-15 19:56:35,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:35,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-15 19:56:35,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:56:35,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:56:35,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:56:35,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:56:35,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:56:35,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:56:35,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:56:35,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:56:35,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955726925] [2024-09-15 19:56:35,789 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:56:35,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036686461] [2024-09-15 19:56:35,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036686461] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-15 19:56:35,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:56:35,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-09-15 19:56:35,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321674895] [2024-09-15 19:56:35,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:56:35,792 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-15 19:56:35,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:56:35,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-15 19:56:35,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-15 19:56:35,792 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) [2024-09-15 19:56:36,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:56:36,031 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2024-09-15 19:56:36,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-15 19:56:36,032 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 [2024-09-15 19:56:36,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:56:36,034 INFO L225 Difference]: With dead ends: 59 [2024-09-15 19:56:36,035 INFO L226 Difference]: Without dead ends: 57 [2024-09-15 19:56:36,035 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-09-15 19:56:36,037 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 [2024-09-15 19:56:36,037 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] [2024-09-15 19:56:36,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-15 19:56:36,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2024-09-15 19:56:36,055 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) [2024-09-15 19:56:36,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2024-09-15 19:56:36,059 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 24 [2024-09-15 19:56:36,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:56:36,059 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2024-09-15 19:56:36,059 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) [2024-09-15 19:56:36,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:36,059 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2024-09-15 19:56:36,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-15 19:56:36,060 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:56:36,060 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] [2024-09-15 19:56:36,075 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-15 19:56:36,260 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 [2024-09-15 19:56:36,261 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:56:36,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:36,261 INFO L85 PathProgramCache]: Analyzing trace with hash 257250778, now seen corresponding path program 1 times [2024-09-15 19:56:36,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:56:36,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411776977] [2024-09-15 19:56:36,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:56:36,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:56:36,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:56:36,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2043379275] [2024-09-15 19:56:36,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:56:36,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:56:36,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:56:36,299 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:56:36,300 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-15 19:56:36,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:36,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-15 19:56:36,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:56:36,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-15 19:56:36,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:56:36,413 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 15 treesize of output 11 [2024-09-15 19:56:36,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:56:36,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-15 19:56:36,643 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 19:56:36,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:56:36,734 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 19:56:36,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:56:36,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411776977] [2024-09-15 19:56:36,735 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:56:36,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043379275] [2024-09-15 19:56:36,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043379275] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-15 19:56:36,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:56:36,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 9 [2024-09-15 19:56:36,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307133355] [2024-09-15 19:56:36,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:56:36,735 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-15 19:56:36,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:56:36,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-15 19:56:36,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-09-15 19:56:36,736 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) [2024-09-15 19:56:36,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:56:36,881 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2024-09-15 19:56:36,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-15 19:56:36,882 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 [2024-09-15 19:56:36,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:56:36,884 INFO L225 Difference]: With dead ends: 72 [2024-09-15 19:56:36,884 INFO L226 Difference]: Without dead ends: 70 [2024-09-15 19:56:36,884 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-09-15 19:56:36,885 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 19 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:56:36,885 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 264 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:56:36,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-09-15 19:56:36,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2024-09-15 19:56:36,903 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) [2024-09-15 19:56:36,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2024-09-15 19:56:36,905 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 36 [2024-09-15 19:56:36,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:56:36,906 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2024-09-15 19:56:36,906 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) [2024-09-15 19:56:36,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:36,907 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2024-09-15 19:56:36,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-15 19:56:36,908 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:56:36,908 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] [2024-09-15 19:56:36,923 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-15 19:56:37,108 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 [2024-09-15 19:56:37,109 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:56:37,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:37,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1949399703, now seen corresponding path program 1 times [2024-09-15 19:56:37,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:56:37,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500814946] [2024-09-15 19:56:37,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:56:37,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:56:37,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:56:37,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [212184091] [2024-09-15 19:56:37,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:56:37,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:56:37,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:56:37,156 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:56:37,157 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-15 19:56:37,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:37,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-09-15 19:56:37,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:56:37,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:56:37,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:56:37,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:56:37,558 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 19:56:37,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:56:38,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:56:38,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500814946] [2024-09-15 19:56:38,600 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:56:38,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212184091] [2024-09-15 19:56:38,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212184091] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:56:38,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:56:38,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-09-15 19:56:38,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627244709] [2024-09-15 19:56:38,600 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:56:38,601 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-15 19:56:38,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:56:38,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-15 19:56:38,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-09-15 19:56:38,602 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) [2024-09-15 19:56:39,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:56:39,091 INFO L93 Difference]: Finished difference Result 126 states and 143 transitions. [2024-09-15 19:56:39,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-15 19:56:39,091 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 [2024-09-15 19:56:39,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:56:39,093 INFO L225 Difference]: With dead ends: 126 [2024-09-15 19:56:39,093 INFO L226 Difference]: Without dead ends: 124 [2024-09-15 19:56:39,093 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2024-09-15 19:56:39,094 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 80 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 41 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 19:56:39,097 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 132 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 245 Invalid, 1 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 19:56:39,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-09-15 19:56:39,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2024-09-15 19:56:39,150 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) [2024-09-15 19:56:39,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 140 transitions. [2024-09-15 19:56:39,152 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 140 transitions. Word has length 42 [2024-09-15 19:56:39,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:56:39,152 INFO L474 AbstractCegarLoop]: Abstraction has 122 states and 140 transitions. [2024-09-15 19:56:39,152 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) [2024-09-15 19:56:39,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:39,153 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 140 transitions. [2024-09-15 19:56:39,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-15 19:56:39,154 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:56:39,154 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] [2024-09-15 19:56:39,172 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-15 19:56:39,355 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 [2024-09-15 19:56:39,356 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:56:39,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:39,357 INFO L85 PathProgramCache]: Analyzing trace with hash -605627993, now seen corresponding path program 1 times [2024-09-15 19:56:39,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:56:39,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373506126] [2024-09-15 19:56:39,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:56:39,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:56:39,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:56:39,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [849185206] [2024-09-15 19:56:39,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:56:39,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:56:39,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:56:39,394 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:56:39,395 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-15 19:56:39,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:39,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-15 19:56:39,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:56:39,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:56:39,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:56:39,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:56:39,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:56:39,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:56:39,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-15 19:56:39,859 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-15 19:56:39,860 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:56:44,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:56:44,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373506126] [2024-09-15 19:56:44,076 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:56:44,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849185206] [2024-09-15 19:56:44,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849185206] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:56:44,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:56:44,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-09-15 19:56:44,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593927507] [2024-09-15 19:56:44,076 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:56:44,077 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-15 19:56:44,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:56:44,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-15 19:56:44,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=105, Unknown=1, NotChecked=0, Total=132 [2024-09-15 19:56:44,078 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) [2024-09-15 19:56:44,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:56:44,522 INFO L93 Difference]: Finished difference Result 140 states and 159 transitions. [2024-09-15 19:56:44,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-15 19:56:44,523 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 [2024-09-15 19:56:44,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:56:44,524 INFO L225 Difference]: With dead ends: 140 [2024-09-15 19:56:44,524 INFO L226 Difference]: Without dead ends: 136 [2024-09-15 19:56:44,525 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=55, Invalid=184, Unknown=1, NotChecked=0, Total=240 [2024-09-15 19:56:44,525 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 44 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 39 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 19:56:44,526 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 92 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 264 Invalid, 2 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 19:56:44,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-09-15 19:56:44,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2024-09-15 19:56:44,554 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) [2024-09-15 19:56:44,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 150 transitions. [2024-09-15 19:56:44,555 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 150 transitions. Word has length 52 [2024-09-15 19:56:44,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:56:44,555 INFO L474 AbstractCegarLoop]: Abstraction has 132 states and 150 transitions. [2024-09-15 19:56:44,555 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) [2024-09-15 19:56:44,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:44,556 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 150 transitions. [2024-09-15 19:56:44,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-15 19:56:44,557 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:56:44,557 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] [2024-09-15 19:56:44,578 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-15 19:56:44,761 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 [2024-09-15 19:56:44,762 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:56:44,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:44,763 INFO L85 PathProgramCache]: Analyzing trace with hash -649217709, now seen corresponding path program 1 times [2024-09-15 19:56:44,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:56:44,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795348048] [2024-09-15 19:56:44,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:56:44,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:56:44,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:44,970 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:56:44,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:44,980 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:56:44,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:45,005 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-15 19:56:45,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:45,007 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-15 19:56:45,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:45,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-15 19:56:45,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:45,011 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-15 19:56:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:45,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-15 19:56:45,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:45,015 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-15 19:56:45,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:56:45,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795348048] [2024-09-15 19:56:45,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795348048] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:56:45,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:56:45,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-15 19:56:45,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965513026] [2024-09-15 19:56:45,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:56:45,016 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-15 19:56:45,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:56:45,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-15 19:56:45,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-15 19:56:45,018 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) [2024-09-15 19:56:45,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:56:45,195 INFO L93 Difference]: Finished difference Result 180 states and 207 transitions. [2024-09-15 19:56:45,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-15 19:56:45,196 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 [2024-09-15 19:56:45,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:56:45,197 INFO L225 Difference]: With dead ends: 180 [2024-09-15 19:56:45,198 INFO L226 Difference]: Without dead ends: 132 [2024-09-15 19:56:45,199 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-09-15 19:56:45,199 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, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:56:45,199 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 104 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:56:45,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-09-15 19:56:45,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2024-09-15 19:56:45,246 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) [2024-09-15 19:56:45,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 144 transitions. [2024-09-15 19:56:45,247 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 144 transitions. Word has length 53 [2024-09-15 19:56:45,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:56:45,247 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 144 transitions. [2024-09-15 19:56:45,247 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) [2024-09-15 19:56:45,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:45,248 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 144 transitions. [2024-09-15 19:56:45,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-15 19:56:45,249 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:56:45,249 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] [2024-09-15 19:56:45,249 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-15 19:56:45,249 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:56:45,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:45,250 INFO L85 PathProgramCache]: Analyzing trace with hash 217789429, now seen corresponding path program 1 times [2024-09-15 19:56:45,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:56:45,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324566946] [2024-09-15 19:56:45,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:56:45,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:56:45,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:45,429 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:56:45,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:45,437 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:56:45,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:45,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-15 19:56:45,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:45,471 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-15 19:56:45,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:45,473 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-15 19:56:45,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:45,483 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 19:56:45,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:45,496 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-15 19:56:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:45,498 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-15 19:56:45,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:45,500 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-15 19:56:45,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:45,502 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-15 19:56:45,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:56:45,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324566946] [2024-09-15 19:56:45,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324566946] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:56:45,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:56:45,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-15 19:56:45,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153345326] [2024-09-15 19:56:45,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:56:45,503 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-15 19:56:45,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:56:45,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-15 19:56:45,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-09-15 19:56:45,504 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) [2024-09-15 19:56:45,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:56:45,681 INFO L93 Difference]: Finished difference Result 134 states and 148 transitions. [2024-09-15 19:56:45,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-15 19:56:45,681 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 [2024-09-15 19:56:45,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:56:45,682 INFO L225 Difference]: With dead ends: 134 [2024-09-15 19:56:45,682 INFO L226 Difference]: Without dead ends: 102 [2024-09-15 19:56:45,683 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-09-15 19:56:45,683 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, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:56:45,683 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 74 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:56:45,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-09-15 19:56:45,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2024-09-15 19:56:45,700 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) [2024-09-15 19:56:45,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 113 transitions. [2024-09-15 19:56:45,701 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 113 transitions. Word has length 58 [2024-09-15 19:56:45,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:56:45,701 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 113 transitions. [2024-09-15 19:56:45,701 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) [2024-09-15 19:56:45,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:45,702 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 113 transitions. [2024-09-15 19:56:45,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-15 19:56:45,702 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:56:45,703 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] [2024-09-15 19:56:45,703 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-09-15 19:56:45,703 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:56:45,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:45,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1027870564, now seen corresponding path program 1 times [2024-09-15 19:56:45,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:56:45,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430954018] [2024-09-15 19:56:45,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:56:45,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:56:45,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:56:45,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1077632111] [2024-09-15 19:56:45,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:56:45,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:56:45,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:56:45,758 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:56:45,767 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-15 19:56:45,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:45,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-09-15 19:56:45,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:56:45,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:56:45,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:56:45,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:56:46,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:56:46,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:56:46,422 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-15 19:56:46,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:56:46,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:56:46,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430954018] [2024-09-15 19:56:46,735 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:56:46,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077632111] [2024-09-15 19:56:46,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077632111] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:56:46,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:56:46,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2024-09-15 19:56:46,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013428979] [2024-09-15 19:56:46,736 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:56:46,736 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-15 19:56:46,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:56:46,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-15 19:56:46,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-09-15 19:56:46,737 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) [2024-09-15 19:56:47,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:56:47,266 INFO L93 Difference]: Finished difference Result 134 states and 152 transitions. [2024-09-15 19:56:47,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-15 19:56:47,267 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 [2024-09-15 19:56:47,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:56:47,268 INFO L225 Difference]: With dead ends: 134 [2024-09-15 19:56:47,268 INFO L226 Difference]: Without dead ends: 132 [2024-09-15 19:56:47,268 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2024-09-15 19:56:47,269 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 54 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 19:56:47,269 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 137 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 19:56:47,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-09-15 19:56:47,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2024-09-15 19:56:47,302 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) [2024-09-15 19:56:47,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 149 transitions. [2024-09-15 19:56:47,304 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 149 transitions. Word has length 66 [2024-09-15 19:56:47,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:56:47,304 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 149 transitions. [2024-09-15 19:56:47,305 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) [2024-09-15 19:56:47,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:47,305 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 149 transitions. [2024-09-15 19:56:47,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-09-15 19:56:47,308 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:56:47,308 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] [2024-09-15 19:56:47,321 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-15 19:56:47,512 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 [2024-09-15 19:56:47,513 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:56:47,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:47,513 INFO L85 PathProgramCache]: Analyzing trace with hash -409790049, now seen corresponding path program 2 times [2024-09-15 19:56:47,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:56:47,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409107405] [2024-09-15 19:56:47,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:56:47,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:56:47,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:56:47,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [96749561] [2024-09-15 19:56:47,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 19:56:47,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:56:47,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:56:47,574 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:56:47,579 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-15 19:56:47,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 19:56:47,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:56:47,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 115 conjuncts are in the unsatisfiable core [2024-09-15 19:56:47,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:56:47,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:56:47,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:56:47,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:56:48,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:56:48,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:56:48,693 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 36 proven. 43 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-09-15 19:56:48,693 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:56:49,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:56:49,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409107405] [2024-09-15 19:56:49,453 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:56:49,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96749561] [2024-09-15 19:56:49,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96749561] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:56:49,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:56:49,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-15 19:56:49,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588973973] [2024-09-15 19:56:49,453 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:56:49,454 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-15 19:56:49,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:56:49,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-15 19:56:49,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-09-15 19:56:49,454 INFO L87 Difference]: Start difference. First operand 130 states and 149 transitions. Second operand has 17 states, 12 states have (on average 2.5) internal successors, (30), 14 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) [2024-09-15 19:56:50,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:56:50,186 INFO L93 Difference]: Finished difference Result 162 states and 185 transitions. [2024-09-15 19:56:50,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-15 19:56:50,191 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 12 states have (on average 2.5) internal successors, (30), 14 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 [2024-09-15 19:56:50,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:56:50,193 INFO L225 Difference]: With dead ends: 162 [2024-09-15 19:56:50,193 INFO L226 Difference]: Without dead ends: 160 [2024-09-15 19:56:50,193 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2024-09-15 19:56:50,194 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 58 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 26 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-15 19:56:50,194 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 208 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 590 Invalid, 2 Unknown, 0 Unchecked, 0.5s Time] [2024-09-15 19:56:50,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-09-15 19:56:50,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 132. [2024-09-15 19:56:50,231 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) [2024-09-15 19:56:50,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 152 transitions. [2024-09-15 19:56:50,232 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 152 transitions. Word has length 90 [2024-09-15 19:56:50,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:56:50,234 INFO L474 AbstractCegarLoop]: Abstraction has 132 states and 152 transitions. [2024-09-15 19:56:50,234 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 12 states have (on average 2.5) internal successors, (30), 14 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) [2024-09-15 19:56:50,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:50,235 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 152 transitions. [2024-09-15 19:56:50,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-09-15 19:56:50,236 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:56:50,236 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] [2024-09-15 19:56:50,250 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-15 19:56:50,436 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 [2024-09-15 19:56:50,437 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:56:50,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:50,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1410569242, now seen corresponding path program 3 times [2024-09-15 19:56:50,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:56:50,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424786966] [2024-09-15 19:56:50,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:56:50,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:56:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:56:50,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [595717050] [2024-09-15 19:56:50,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 19:56:50,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:56:50,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:56:50,519 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:56:50,520 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-15 19:56:50,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-15 19:56:50,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:56:50,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 141 conjuncts are in the unsatisfiable core [2024-09-15 19:56:50,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:56:50,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:56:50,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:56:50,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:56:51,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:56:51,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:56:51,659 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 78 proven. 67 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2024-09-15 19:56:51,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:56:52,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:56:52,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424786966] [2024-09-15 19:56:52,770 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:56:52,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595717050] [2024-09-15 19:56:52,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595717050] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:56:52,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:56:52,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-15 19:56:52,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544642548] [2024-09-15 19:56:52,771 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:56:52,771 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-15 19:56:52,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:56:52,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-15 19:56:52,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2024-09-15 19:56:52,772 INFO L87 Difference]: Start difference. First operand 132 states and 152 transitions. Second operand has 19 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-15 19:56:54,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:56:54,090 INFO L93 Difference]: Finished difference Result 164 states and 188 transitions. [2024-09-15 19:56:54,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-15 19:56:54,091 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) Word has length 114 [2024-09-15 19:56:54,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:56:54,094 INFO L225 Difference]: With dead ends: 164 [2024-09-15 19:56:54,094 INFO L226 Difference]: Without dead ends: 162 [2024-09-15 19:56:54,095 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=189, Invalid=1143, Unknown=0, NotChecked=0, Total=1332 [2024-09-15 19:56:54,095 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 60 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 26 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-15 19:56:54,095 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 285 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 849 Invalid, 1 Unknown, 0 Unchecked, 0.8s Time] [2024-09-15 19:56:54,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-09-15 19:56:54,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 134. [2024-09-15 19:56:54,142 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) [2024-09-15 19:56:54,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 155 transitions. [2024-09-15 19:56:54,143 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 155 transitions. Word has length 114 [2024-09-15 19:56:54,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:56:54,143 INFO L474 AbstractCegarLoop]: Abstraction has 134 states and 155 transitions. [2024-09-15 19:56:54,143 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-15 19:56:54,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:54,144 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 155 transitions. [2024-09-15 19:56:54,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-09-15 19:56:54,145 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:56:54,145 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] [2024-09-15 19:56:54,159 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-15 19:56:54,349 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 [2024-09-15 19:56:54,349 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:56:54,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:54,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1625386709, now seen corresponding path program 4 times [2024-09-15 19:56:54,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:56:54,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903191219] [2024-09-15 19:56:54,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:56:54,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:56:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:56:54,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1022046822] [2024-09-15 19:56:54,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 19:56:54,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:56:54,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:56:54,405 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:56:54,407 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-15 19:56:54,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 19:56:54,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:56:54,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 204 conjuncts are in the unsatisfiable core [2024-09-15 19:56:54,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:56:54,810 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 [2024-09-15 19:56:55,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2024-09-15 19:56:55,235 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 15 [2024-09-15 19:56:55,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:56:55,469 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 46 treesize of output 30 [2024-09-15 19:56:55,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2024-09-15 19:56:55,913 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 45 treesize of output 29 [2024-09-15 19:56:55,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-15 19:56:56,005 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 223 proven. 46 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2024-09-15 19:56:56,005 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:56:58,195 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:56:58,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 101 [2024-09-15 19:56:58,265 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:56:58,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 119 [2024-09-15 19:56:58,294 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:56:58,295 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 125 treesize of output 108 [2024-09-15 19:56:59,287 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:56:59,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 101 [2024-09-15 19:57:03,386 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:57:03,386 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 [2024-09-15 19:57:06,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:57:06,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903191219] [2024-09-15 19:57:06,677 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:57:06,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022046822] [2024-09-15 19:57:06,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022046822] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:57:06,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:57:06,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-09-15 19:57:06,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049967974] [2024-09-15 19:57:06,678 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:57:06,679 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-15 19:57:06,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:57:06,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-15 19:57:06,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2024-09-15 19:57:06,681 INFO L87 Difference]: Start difference. First operand 134 states and 155 transitions. Second operand has 26 states, 19 states have (on average 2.263157894736842) internal successors, (43), 21 states have internal predecessors, (43), 12 states have call successors, (20), 6 states have call predecessors, (20), 7 states have return successors, (17), 11 states have call predecessors, (17), 10 states have call successors, (17) [2024-09-15 19:57:08,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:57:08,517 INFO L93 Difference]: Finished difference Result 189 states and 214 transitions. [2024-09-15 19:57:08,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-15 19:57:08,518 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 19 states have (on average 2.263157894736842) internal successors, (43), 21 states have internal predecessors, (43), 12 states have call successors, (20), 6 states have call predecessors, (20), 7 states have return successors, (17), 11 states have call predecessors, (17), 10 states have call successors, (17) Word has length 138 [2024-09-15 19:57:08,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:57:08,521 INFO L225 Difference]: With dead ends: 189 [2024-09-15 19:57:08,521 INFO L226 Difference]: Without dead ends: 187 [2024-09-15 19:57:08,523 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=281, Invalid=2269, Unknown=0, NotChecked=0, Total=2550 [2024-09-15 19:57:08,523 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 64 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 51 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-15 19:57:08,523 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 370 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 897 Invalid, 4 Unknown, 0 Unchecked, 0.9s Time] [2024-09-15 19:57:08,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2024-09-15 19:57:08,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 127. [2024-09-15 19:57:08,587 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) [2024-09-15 19:57:08,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 142 transitions. [2024-09-15 19:57:08,589 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 142 transitions. Word has length 138 [2024-09-15 19:57:08,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:57:08,590 INFO L474 AbstractCegarLoop]: Abstraction has 127 states and 142 transitions. [2024-09-15 19:57:08,590 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 19 states have (on average 2.263157894736842) internal successors, (43), 21 states have internal predecessors, (43), 12 states have call successors, (20), 6 states have call predecessors, (20), 7 states have return successors, (17), 11 states have call predecessors, (17), 10 states have call successors, (17) [2024-09-15 19:57:08,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:57:08,590 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 142 transitions. [2024-09-15 19:57:08,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-09-15 19:57:08,591 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:57:08,591 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] [2024-09-15 19:57:08,603 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-15 19:57:08,791 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 [2024-09-15 19:57:08,792 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:57:08,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:57:08,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1593861602, now seen corresponding path program 1 times [2024-09-15 19:57:08,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:57:08,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990106757] [2024-09-15 19:57:08,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:57:08,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:57:08,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:08,941 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:57:08,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:08,950 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:57:08,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:09,026 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-15 19:57:09,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:09,029 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-15 19:57:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:09,030 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-15 19:57:09,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:09,032 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 19:57:09,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:09,051 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-15 19:57:09,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:09,053 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-15 19:57:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:09,055 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-15 19:57:09,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:09,064 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-15 19:57:09,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:09,108 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-15 19:57:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:09,111 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-15 19:57:09,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:09,113 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-09-15 19:57:09,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:57:09,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990106757] [2024-09-15 19:57:09,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990106757] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:57:09,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030220396] [2024-09-15 19:57:09,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:57:09,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:57:09,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:57:09,116 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:57:09,116 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-15 19:57:09,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:09,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-15 19:57:09,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:57:09,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:57:09,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:57:09,384 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-09-15 19:57:09,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:57:09,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030220396] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:57:09,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:57:09,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2024-09-15 19:57:09,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212113948] [2024-09-15 19:57:09,576 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:57:09,577 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-15 19:57:09,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:57:09,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-15 19:57:09,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2024-09-15 19:57:09,578 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) [2024-09-15 19:57:10,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:57:10,054 INFO L93 Difference]: Finished difference Result 132 states and 150 transitions. [2024-09-15 19:57:10,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-15 19:57:10,058 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 [2024-09-15 19:57:10,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:57:10,059 INFO L225 Difference]: With dead ends: 132 [2024-09-15 19:57:10,059 INFO L226 Difference]: Without dead ends: 120 [2024-09-15 19:57:10,059 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=659, Unknown=0, NotChecked=0, Total=812 [2024-09-15 19:57:10,060 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 51 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 19:57:10,060 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 122 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 19:57:10,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-09-15 19:57:10,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2024-09-15 19:57:10,091 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) [2024-09-15 19:57:10,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 130 transitions. [2024-09-15 19:57:10,092 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 130 transitions. Word has length 76 [2024-09-15 19:57:10,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:57:10,093 INFO L474 AbstractCegarLoop]: Abstraction has 117 states and 130 transitions. [2024-09-15 19:57:10,093 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) [2024-09-15 19:57:10,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:57:10,093 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 130 transitions. [2024-09-15 19:57:10,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-09-15 19:57:10,097 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:57:10,097 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] [2024-09-15 19:57:10,111 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-15 19:57:10,301 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 [2024-09-15 19:57:10,302 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:57:10,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:57:10,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1184517000, now seen corresponding path program 1 times [2024-09-15 19:57:10,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:57:10,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334654450] [2024-09-15 19:57:10,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:57:10,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:57:10,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:57:10,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1917700445] [2024-09-15 19:57:10,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:57:10,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:57:10,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:57:10,355 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:57:10,356 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-15 19:57:10,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:10,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 188 conjuncts are in the unsatisfiable core [2024-09-15 19:57:10,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:57:10,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:57:10,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:57:10,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-15 19:57:10,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:57:10,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:57:10,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:57:10,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:57:11,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:57:11,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:57:11,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:57:11,631 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-09-15 19:57:11,631 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 [2024-09-15 19:57:11,685 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-15 19:57:11,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-09-15 19:57:11,884 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:57:11,884 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 88 treesize of output 140 [2024-09-15 19:57:11,932 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:57:11,933 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 126 treesize of output 198 [2024-09-15 19:57:12,089 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 51 proven. 29 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-09-15 19:57:12,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:57:16,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:57:16,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334654450] [2024-09-15 19:57:16,457 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:57:16,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917700445] [2024-09-15 19:57:16,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917700445] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:57:16,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:57:16,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-15 19:57:16,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815731801] [2024-09-15 19:57:16,458 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:57:16,458 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-15 19:57:16,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:57:16,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-15 19:57:16,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2024-09-15 19:57:16,459 INFO L87 Difference]: Start difference. First operand 117 states and 130 transitions. Second operand has 20 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 10 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-15 19:57:17,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:57:17,953 INFO L93 Difference]: Finished difference Result 159 states and 186 transitions. [2024-09-15 19:57:17,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-15 19:57:17,954 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 10 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) Word has length 77 [2024-09-15 19:57:17,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:57:17,955 INFO L225 Difference]: With dead ends: 159 [2024-09-15 19:57:17,956 INFO L226 Difference]: Without dead ends: 157 [2024-09-15 19:57:17,956 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 71 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=171, Invalid=1235, Unknown=0, NotChecked=0, Total=1406 [2024-09-15 19:57:17,957 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 65 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 32 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-15 19:57:17,957 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 224 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 687 Invalid, 4 Unknown, 0 Unchecked, 0.9s Time] [2024-09-15 19:57:17,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-09-15 19:57:18,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 153. [2024-09-15 19:57:18,011 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) [2024-09-15 19:57:18,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 175 transitions. [2024-09-15 19:57:18,012 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 175 transitions. Word has length 77 [2024-09-15 19:57:18,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:57:18,013 INFO L474 AbstractCegarLoop]: Abstraction has 153 states and 175 transitions. [2024-09-15 19:57:18,013 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 10 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-15 19:57:18,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:57:18,014 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 175 transitions. [2024-09-15 19:57:18,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-09-15 19:57:18,015 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:57:18,015 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] [2024-09-15 19:57:18,029 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-15 19:57:18,217 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 [2024-09-15 19:57:18,218 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:57:18,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:57:18,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1910667427, now seen corresponding path program 2 times [2024-09-15 19:57:18,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:57:18,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828852804] [2024-09-15 19:57:18,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:57:18,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:57:18,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:57:18,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [242109952] [2024-09-15 19:57:18,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 19:57:18,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:57:18,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:57:18,283 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:57:18,284 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-15 19:57:18,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 19:57:18,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:57:18,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 210 conjuncts are in the unsatisfiable core [2024-09-15 19:57:18,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:57:18,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-15 19:57:18,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:57:18,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:57:18,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:57:18,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:57:18,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:57:19,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:57:19,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:57:20,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:57:20,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:57:20,149 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-09-15 19:57:20,149 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 [2024-09-15 19:57:20,191 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-15 19:57:20,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-09-15 19:57:20,435 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:57:20,436 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 92 treesize of output 136 [2024-09-15 19:57:20,499 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:57:20,499 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 68 treesize of output 160 [2024-09-15 19:57:20,632 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 72 proven. 48 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2024-09-15 19:57:20,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:57:28,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:57:28,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828852804] [2024-09-15 19:57:28,121 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:57:28,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242109952] [2024-09-15 19:57:28,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242109952] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:57:28,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:57:28,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-15 19:57:28,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26412695] [2024-09-15 19:57:28,122 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:57:28,122 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-15 19:57:28,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:57:28,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-15 19:57:28,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=828, Unknown=1, NotChecked=0, Total=930 [2024-09-15 19:57:28,123 INFO L87 Difference]: Start difference. First operand 153 states and 175 transitions. Second operand has 20 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 10 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-15 19:57:30,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:57:30,699 INFO L93 Difference]: Finished difference Result 195 states and 231 transitions. [2024-09-15 19:57:30,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-15 19:57:30,700 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 10 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 101 [2024-09-15 19:57:30,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:57:30,701 INFO L225 Difference]: With dead ends: 195 [2024-09-15 19:57:30,702 INFO L226 Difference]: Without dead ends: 193 [2024-09-15 19:57:30,702 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 94 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=166, Invalid=1239, Unknown=1, NotChecked=0, Total=1406 [2024-09-15 19:57:30,703 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 48 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 21 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-09-15 19:57:30,703 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 344 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1018 Invalid, 2 Unknown, 0 Unchecked, 1.9s Time] [2024-09-15 19:57:30,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-09-15 19:57:30,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 155. [2024-09-15 19:57:30,799 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) [2024-09-15 19:57:30,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 178 transitions. [2024-09-15 19:57:30,800 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 178 transitions. Word has length 101 [2024-09-15 19:57:30,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:57:30,800 INFO L474 AbstractCegarLoop]: Abstraction has 155 states and 178 transitions. [2024-09-15 19:57:30,801 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 10 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-15 19:57:30,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:57:30,801 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 178 transitions. [2024-09-15 19:57:30,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-09-15 19:57:30,802 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:57:30,802 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] [2024-09-15 19:57:30,819 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-15 19:57:31,002 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 [2024-09-15 19:57:31,003 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:57:31,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:57:31,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1396227582, now seen corresponding path program 3 times [2024-09-15 19:57:31,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:57:31,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784420171] [2024-09-15 19:57:31,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:57:31,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:57:31,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:57:31,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1723966006] [2024-09-15 19:57:31,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 19:57:31,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:57:31,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:57:31,048 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:57:31,050 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-15 19:57:32,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-15 19:57:32,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:57:32,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 288 conjuncts are in the unsatisfiable core [2024-09-15 19:57:32,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:57:32,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:57:32,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:57:32,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:57:32,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:57:32,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:57:32,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-15 19:57:34,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:57:34,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:57:35,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:57:35,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:57:35,170 INFO L349 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2024-09-15 19:57:35,171 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 [2024-09-15 19:57:35,230 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-09-15 19:57:35,230 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 [2024-09-15 19:57:35,507 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:57:35,507 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 112 [2024-09-15 19:57:35,525 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:57:35,525 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 110 treesize of output 98 [2024-09-15 19:57:35,639 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 123 proven. 94 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-09-15 19:57:35,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:57:38,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:57:38,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784420171] [2024-09-15 19:57:38,489 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:57:38,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723966006] [2024-09-15 19:57:38,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723966006] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:57:38,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:57:38,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-09-15 19:57:38,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158523587] [2024-09-15 19:57:38,490 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:57:38,490 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-15 19:57:38,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:57:38,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-15 19:57:38,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2024-09-15 19:57:38,491 INFO L87 Difference]: Start difference. First operand 155 states and 178 transitions. Second operand has 27 states, 21 states have (on average 2.238095238095238) internal successors, (47), 23 states have internal predecessors, (47), 12 states have call successors, (19), 7 states have call predecessors, (19), 9 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2024-09-15 19:57:41,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:57:41,424 INFO L93 Difference]: Finished difference Result 197 states and 234 transitions. [2024-09-15 19:57:41,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-15 19:57:41,425 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 2.238095238095238) internal successors, (47), 23 states have internal predecessors, (47), 12 states have call successors, (19), 7 states have call predecessors, (19), 9 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) Word has length 125 [2024-09-15 19:57:41,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:57:41,429 INFO L225 Difference]: With dead ends: 197 [2024-09-15 19:57:41,429 INFO L226 Difference]: Without dead ends: 195 [2024-09-15 19:57:41,430 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=247, Invalid=2105, Unknown=0, NotChecked=0, Total=2352 [2024-09-15 19:57:41,430 INFO L434 NwaCegarLoop]: 54 mSDtfsCounter, 61 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 1424 mSolverCounterSat, 28 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 1456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1424 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-09-15 19:57:41,433 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 523 Invalid, 1456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1424 Invalid, 4 Unknown, 0 Unchecked, 1.9s Time] [2024-09-15 19:57:41,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-09-15 19:57:41,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 157. [2024-09-15 19:57:41,519 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) [2024-09-15 19:57:41,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 181 transitions. [2024-09-15 19:57:41,521 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 181 transitions. Word has length 125 [2024-09-15 19:57:41,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:57:41,523 INFO L474 AbstractCegarLoop]: Abstraction has 157 states and 181 transitions. [2024-09-15 19:57:41,524 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 2.238095238095238) internal successors, (47), 23 states have internal predecessors, (47), 12 states have call successors, (19), 7 states have call predecessors, (19), 9 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2024-09-15 19:57:41,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:57:41,526 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 181 transitions. [2024-09-15 19:57:41,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-09-15 19:57:41,527 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:57:41,527 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] [2024-09-15 19:57:41,550 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-15 19:57:41,727 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 [2024-09-15 19:57:41,727 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:57:41,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:57:41,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1715931769, now seen corresponding path program 4 times [2024-09-15 19:57:41,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:57:41,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026161360] [2024-09-15 19:57:41,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:57:41,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:57:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:57:41,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1538239958] [2024-09-15 19:57:41,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 19:57:41,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:57:41,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:57:41,792 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:57:41,802 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-15 19:57:42,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 19:57:42,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:57:42,100 WARN L260 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 331 conjuncts are in the unsatisfiable core [2024-09-15 19:57:42,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:58:11,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2024-09-15 19:58:11,497 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 48 treesize of output 32 [2024-09-15 19:58:11,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 38 [2024-09-15 19:58:11,697 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 [2024-09-15 20:00:57,538 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 63 treesize of output 43 [2024-09-15 20:00:57,556 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 117 treesize of output 70 [2024-09-15 20:00:59,475 INFO L349 Elim1Store]: treesize reduction 132, result has 25.8 percent of original size [2024-09-15 20:00:59,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2024-09-15 20:00:59,559 INFO L349 Elim1Store]: treesize reduction 56, result has 49.5 percent of original size [2024-09-15 20:00:59,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 108 treesize of output 128 [2024-09-15 20:01:00,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 20:01:00,885 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 20:01:00,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 243 treesize of output 375 [2024-09-15 20:01:01,240 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 20:01:01,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 300 treesize of output 544