./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_mannadiv.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ca4ee3dd 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_mannadiv.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 305ef194ca8c72f4da0a6deb18ed40b72305718d65c18a21aa3fcb3830c499e5 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-ca4ee3d-m [2024-09-20 20:01:26,905 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 20:01:26,960 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 20:01:26,964 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 20:01:26,965 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 20:01:26,991 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 20:01:26,992 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 20:01:26,992 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 20:01:26,993 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 20:01:26,994 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 20:01:26,994 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 20:01:26,994 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 20:01:26,995 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 20:01:26,995 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 20:01:26,996 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 20:01:26,997 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 20:01:26,997 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 20:01:26,997 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 20:01:26,997 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 20:01:26,998 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 20:01:26,998 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 20:01:27,001 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 20:01:27,001 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 20:01:27,001 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 20:01:27,001 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 20:01:27,001 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 20:01:27,001 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 20:01:27,002 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 20:01:27,002 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 20:01:27,002 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 20:01:27,002 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 20:01:27,002 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 20:01:27,002 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 20:01:27,003 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 20:01:27,003 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 20:01:27,003 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 20:01:27,003 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 20:01:27,004 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 20:01:27,004 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 20:01:27,004 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 20:01:27,004 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 20:01:27,005 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 20:01:27,006 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 305ef194ca8c72f4da0a6deb18ed40b72305718d65c18a21aa3fcb3830c499e5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 20:01:27,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 20:01:27,237 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 20:01:27,239 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 20:01:27,240 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 20:01:27,241 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 20:01:27,242 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_mannadiv.c [2024-09-20 20:01:28,601 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 20:01:28,741 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 20:01:28,742 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_mannadiv.c [2024-09-20 20:01:28,747 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/0ab71cf56/641e72d1b7f0472994f0cd4cbf1ea14f/FLAG9d2542290 [2024-09-20 20:01:28,763 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/0ab71cf56/641e72d1b7f0472994f0cd4cbf1ea14f [2024-09-20 20:01:28,766 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 20:01:28,767 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 20:01:28,769 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 20:01:28,770 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 20:01:28,773 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 20:01:28,775 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 08:01:28" (1/1) ... [2024-09-20 20:01:28,775 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f9fe7f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:01:28, skipping insertion in model container [2024-09-20 20:01:28,775 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 08:01:28" (1/1) ... [2024-09-20 20:01:28,800 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 20:01:28,922 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_mannadiv.c[1105,1118] [2024-09-20 20:01:28,937 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 20:01:28,944 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 20:01:28,953 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_mannadiv.c[1105,1118] [2024-09-20 20:01:28,959 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 20:01:29,003 INFO L204 MainTranslator]: Completed translation [2024-09-20 20:01:29,011 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:01:29 WrapperNode [2024-09-20 20:01:29,011 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 20:01:29,012 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 20:01:29,012 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 20:01:29,012 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 20:01:29,019 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:01:29" (1/1) ... [2024-09-20 20:01:29,025 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:01:29" (1/1) ... [2024-09-20 20:01:29,040 INFO L138 Inliner]: procedures = 16, calls = 57, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 20:01:29,040 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 20:01:29,041 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 20:01:29,041 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 20:01:29,041 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 20:01:29,067 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:01:29" (1/1) ... [2024-09-20 20:01:29,071 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:01:29" (1/1) ... [2024-09-20 20:01:29,073 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:01:29" (1/1) ... [2024-09-20 20:01:29,094 INFO L175 MemorySlicer]: Split 31 memory accesses to 6 slices as follows [2, 5, 7, 5, 7, 5]. 23 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 10 writes are split as follows [0, 1, 3, 1, 3, 2]. [2024-09-20 20:01:29,095 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:01:29" (1/1) ... [2024-09-20 20:01:29,095 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:01:29" (1/1) ... [2024-09-20 20:01:29,104 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:01:29" (1/1) ... [2024-09-20 20:01:29,108 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:01:29" (1/1) ... [2024-09-20 20:01:29,109 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:01:29" (1/1) ... [2024-09-20 20:01:29,110 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:01:29" (1/1) ... [2024-09-20 20:01:29,115 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 20:01:29,115 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 20:01:29,115 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 20:01:29,116 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 20:01:29,116 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:01:29" (1/1) ... [2024-09-20 20:01:29,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 20:01:29,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:01:29,147 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) [2024-09-20 20:01:29,155 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 [2024-09-20 20:01:29,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 20:01:29,186 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-20 20:01:29,186 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-20 20:01:29,186 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 20:01:29,186 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 20:01:29,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 20:01:29,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-20 20:01:29,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-20 20:01:29,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-20 20:01:29,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-20 20:01:29,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-20 20:01:29,187 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-20 20:01:29,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-20 20:01:29,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-20 20:01:29,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-20 20:01:29,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-20 20:01:29,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-20 20:01:29,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-20 20:01:29,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 20:01:29,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 20:01:29,189 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_31_to_42_0 [2024-09-20 20:01:29,189 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_31_to_42_0 [2024-09-20 20:01:29,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 20:01:29,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 20:01:29,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-20 20:01:29,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-20 20:01:29,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-20 20:01:29,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-20 20:01:29,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-20 20:01:29,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-20 20:01:29,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 20:01:29,190 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 20:01:29,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-20 20:01:29,261 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 20:01:29,263 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 20:01:29,394 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-20 20:01:29,395 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 20:01:29,420 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 20:01:29,420 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-20 20:01:29,421 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 08:01:29 BoogieIcfgContainer [2024-09-20 20:01:29,421 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 20:01:29,425 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 20:01:29,426 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 20:01:29,428 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 20:01:29,428 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 08:01:28" (1/3) ... [2024-09-20 20:01:29,429 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@367855ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 08:01:29, skipping insertion in model container [2024-09-20 20:01:29,429 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:01:29" (2/3) ... [2024-09-20 20:01:29,430 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@367855ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 08:01:29, skipping insertion in model container [2024-09-20 20:01:29,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 08:01:29" (3/3) ... [2024-09-20 20:01:29,432 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_mannadiv.c [2024-09-20 20:01:29,445 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 20:01:29,445 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 20:01:29,486 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 20:01:29,491 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;@5e72019b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 20:01:29,491 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 20:01:29,495 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-20 20:01:29,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-20 20:01:29,501 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:01:29,501 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:01:29,502 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:01:29,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:29,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1619877398, now seen corresponding path program 1 times [2024-09-20 20:01:29,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:01:29,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068643611] [2024-09-20 20:01:29,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:01:29,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:01:29,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:01:29,695 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 20:01:29,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:01:29,709 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 20:01:29,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:01:29,718 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 20:01:29,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:01:29,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 20:01:29,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:01:29,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068643611] [2024-09-20 20:01:29,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068643611] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 20:01:29,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 20:01:29,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 20:01:29,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124886356] [2024-09-20 20:01:29,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 20:01:29,735 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 20:01:29,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:01:29,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 20:01:29,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 20:01:29,755 INFO L87 Difference]: Start difference. First operand has 35 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 20:01:29,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:01:29,795 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2024-09-20 20:01:29,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 20:01:29,797 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-09-20 20:01:29,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:01:29,803 INFO L225 Difference]: With dead ends: 64 [2024-09-20 20:01:29,804 INFO L226 Difference]: Without dead ends: 31 [2024-09-20 20:01:29,806 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 20:01:29,809 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 20:01:29,810 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 20:01:29,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-20 20:01:29,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-20 20:01:29,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 20:01:29,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-09-20 20:01:29,837 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2024-09-20 20:01:29,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:01:29,838 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-09-20 20:01:29,838 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 20:01:29,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:29,839 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-09-20 20:01:29,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-20 20:01:29,840 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:01:29,840 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:01:29,840 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 20:01:29,840 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:01:29,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:29,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1787806574, now seen corresponding path program 1 times [2024-09-20 20:01:29,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:01:29,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045621220] [2024-09-20 20:01:29,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:01:29,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:01:29,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:01:29,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [16569387] [2024-09-20 20:01:29,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:01:29,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:01:29,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:01:29,926 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) [2024-09-20 20:01:29,930 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 20:01:30,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:01:30,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-20 20:01:30,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:01:30,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 20:01:30,120 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 [2024-09-20 20:01:30,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 20:01:30,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 20:01:30,248 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 [2024-09-20 20:01:30,254 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 [2024-09-20 20:01:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 20:01:30,297 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 20:01:30,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:01:30,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045621220] [2024-09-20 20:01:30,298 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:01:30,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16569387] [2024-09-20 20:01:30,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16569387] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 20:01:30,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 20:01:30,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-20 20:01:30,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929878726] [2024-09-20 20:01:30,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 20:01:30,299 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 20:01:30,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:01:30,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 20:01:30,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-20 20:01:30,301 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-20 20:01:30,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:01:30,446 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2024-09-20 20:01:30,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 20:01:30,447 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), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2024-09-20 20:01:30,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:01:30,448 INFO L225 Difference]: With dead ends: 46 [2024-09-20 20:01:30,448 INFO L226 Difference]: Without dead ends: 44 [2024-09-20 20:01:30,449 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-20 20:01:30,449 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 14 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 20:01:30,450 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 149 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 20:01:30,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-09-20 20:01:30,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2024-09-20 20:01:30,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 28 states have internal predecessors, (30), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-20 20:01:30,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2024-09-20 20:01:30,458 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 24 [2024-09-20 20:01:30,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:01:30,458 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2024-09-20 20:01:30,459 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), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-20 20:01:30,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:30,459 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2024-09-20 20:01:30,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-20 20:01:30,460 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:01:30,460 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:01:30,473 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-20 20:01:30,660 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:01:30,661 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:01:30,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:30,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1422973788, now seen corresponding path program 1 times [2024-09-20 20:01:30,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:01:30,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184202781] [2024-09-20 20:01:30,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:01:30,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:01:30,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:01:30,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [354066613] [2024-09-20 20:01:30,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:01:30,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:01:30,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:01:30,722 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) [2024-09-20 20:01:30,723 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 20:01:30,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:01:30,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-20 20:01:30,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:01:30,827 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 [2024-09-20 20:01:30,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 20:01:30,835 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 [2024-09-20 20:01:30,855 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 [2024-09-20 20:01:30,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-20 20:01:31,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 20:01:31,024 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 20:01:31,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:01:31,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184202781] [2024-09-20 20:01:31,024 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:01:31,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354066613] [2024-09-20 20:01:31,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354066613] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 20:01:31,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 20:01:31,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-09-20 20:01:31,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172623915] [2024-09-20 20:01:31,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 20:01:31,025 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 20:01:31,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:01:31,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 20:01:31,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-09-20 20:01:31,026 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-20 20:01:31,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:01:31,235 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2024-09-20 20:01:31,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-20 20:01:31,236 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 34 [2024-09-20 20:01:31,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:01:31,238 INFO L225 Difference]: With dead ends: 52 [2024-09-20 20:01:31,238 INFO L226 Difference]: Without dead ends: 42 [2024-09-20 20:01:31,238 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2024-09-20 20:01:31,239 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 20:01:31,240 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 70 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 20:01:31,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-20 20:01:31,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-09-20 20:01:31,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-20 20:01:31,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2024-09-20 20:01:31,247 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 34 [2024-09-20 20:01:31,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:01:31,247 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2024-09-20 20:01:31,247 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-20 20:01:31,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:31,248 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2024-09-20 20:01:31,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-20 20:01:31,248 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:01:31,248 INFO L216 NwaCegarLoop]: trace histogram [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] [2024-09-20 20:01:31,261 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-20 20:01:31,450 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:01:31,451 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:01:31,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:31,451 INFO L85 PathProgramCache]: Analyzing trace with hash 480719411, now seen corresponding path program 1 times [2024-09-20 20:01:31,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:01:31,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245108197] [2024-09-20 20:01:31,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:01:31,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:01:31,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:01:31,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2091558494] [2024-09-20 20:01:31,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:01:31,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:01:31,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:01:31,516 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) [2024-09-20 20:01:31,516 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 20:01:31,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:01:31,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 133 conjuncts are in the unsatisfiable core [2024-09-20 20:01:31,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:01:31,618 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 [2024-09-20 20:01:31,620 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 [2024-09-20 20:01:31,628 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 [2024-09-20 20:01:31,632 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 [2024-09-20 20:01:31,637 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 [2024-09-20 20:01:31,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 20:01:31,895 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 [2024-09-20 20:01:31,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2024-09-20 20:01:31,976 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 [2024-09-20 20:01:31,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-20 20:01:32,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 20:01:32,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:01:32,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 20:01:32,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:01:32,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245108197] [2024-09-20 20:01:32,289 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:01:32,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091558494] [2024-09-20 20:01:32,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091558494] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 20:01:32,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 20:01:32,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2024-09-20 20:01:32,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038698228] [2024-09-20 20:01:32,290 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 20:01:32,291 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-20 20:01:32,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:01:32,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-20 20:01:32,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-09-20 20:01:32,292 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 19 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-20 20:01:32,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:01:32,929 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2024-09-20 20:01:32,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-20 20:01:32,930 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2024-09-20 20:01:32,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:01:32,931 INFO L225 Difference]: With dead ends: 63 [2024-09-20 20:01:32,931 INFO L226 Difference]: Without dead ends: 59 [2024-09-20 20:01:32,931 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2024-09-20 20:01:32,932 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 54 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 20:01:32,932 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 244 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 20:01:32,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-20 20:01:32,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2024-09-20 20:01:32,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-09-20 20:01:32,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2024-09-20 20:01:32,949 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 35 [2024-09-20 20:01:32,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:01:32,949 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2024-09-20 20:01:32,950 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-20 20:01:32,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:32,950 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2024-09-20 20:01:32,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-20 20:01:32,951 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:01:32,951 INFO L216 NwaCegarLoop]: trace histogram [3, 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] [2024-09-20 20:01:32,967 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-20 20:01:33,155 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:01:33,156 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:01:33,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:33,157 INFO L85 PathProgramCache]: Analyzing trace with hash 474321093, now seen corresponding path program 1 times [2024-09-20 20:01:33,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:01:33,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48816567] [2024-09-20 20:01:33,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:01:33,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:01:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:01:33,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [944417851] [2024-09-20 20:01:33,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:01:33,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:01:33,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:01:33,189 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) [2024-09-20 20:01:33,197 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 20:01:33,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:01:33,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 141 conjuncts are in the unsatisfiable core [2024-09-20 20:01:33,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:01:33,296 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 [2024-09-20 20:01:33,298 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 [2024-09-20 20:01:33,304 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 [2024-09-20 20:01:33,305 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 [2024-09-20 20:01:33,309 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 [2024-09-20 20:01:33,319 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 [2024-09-20 20:01:33,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2024-09-20 20:01:34,195 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 23 treesize of output 3 [2024-09-20 20:01:34,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2024-09-20 20:01:34,237 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 34 treesize of output 22 [2024-09-20 20:01:34,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2024-09-20 20:01:34,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-09-20 20:01:34,344 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-20 20:01:34,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:01:35,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:01:35,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48816567] [2024-09-20 20:01:35,572 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:01:35,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944417851] [2024-09-20 20:01:35,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944417851] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:01:35,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:01:35,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-20 20:01:35,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52384181] [2024-09-20 20:01:35,573 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:01:35,573 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-20 20:01:35,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:01:35,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-20 20:01:35,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2024-09-20 20:01:35,574 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 18 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-20 20:01:36,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:01:36,445 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2024-09-20 20:01:36,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 20:01:36,446 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2024-09-20 20:01:36,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:01:36,448 INFO L225 Difference]: With dead ends: 64 [2024-09-20 20:01:36,449 INFO L226 Difference]: Without dead ends: 54 [2024-09-20 20:01:36,450 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2024-09-20 20:01:36,450 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 19 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 20:01:36,451 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 110 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 20:01:36,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-20 20:01:36,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-09-20 20:01:36,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 12 states have call successors, (12), 9 states have call predecessors, (12), 7 states have return successors, (15), 9 states have call predecessors, (15), 10 states have call successors, (15) [2024-09-20 20:01:36,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2024-09-20 20:01:36,478 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 47 [2024-09-20 20:01:36,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:01:36,479 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2024-09-20 20:01:36,479 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-20 20:01:36,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:36,479 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2024-09-20 20:01:36,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-20 20:01:36,480 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:01:36,480 INFO L216 NwaCegarLoop]: trace histogram [3, 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] [2024-09-20 20:01:36,495 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-20 20:01:36,680 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:01:36,681 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:01:36,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:36,681 INFO L85 PathProgramCache]: Analyzing trace with hash -343327357, now seen corresponding path program 1 times [2024-09-20 20:01:36,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:01:36,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390329983] [2024-09-20 20:01:36,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:01:36,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:01:36,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:01:36,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166435231] [2024-09-20 20:01:36,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:01:36,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:01:36,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:01:36,713 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) [2024-09-20 20:01:36,718 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 20:01:36,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:01:36,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 136 conjuncts are in the unsatisfiable core [2024-09-20 20:01:36,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:01:36,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 20:01:36,839 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 [2024-09-20 20:01:36,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 20:01:36,848 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 [2024-09-20 20:01:36,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 20:01:36,866 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 [2024-09-20 20:01:37,422 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 [2024-09-20 20:01:37,457 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 [2024-09-20 20:01:37,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-20 20:01:37,513 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-20 20:01:37,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:01:42,572 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((|v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_7| Int)) (= (select (select |c_#memory_int#1| |v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_7|) |v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_7|) (+ (select (select |c_#memory_int#2| |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_7|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_7|) (* (select (select |c_#memory_int#3| |v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_7|) |v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_7|) (select (select |c_#memory_int#5| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_7|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_7|))))))) (and (or (= (select (select |c_old(#memory_int#4)| |c_func_to_recursive_line_31_to_42_0_#in~y3.base|) |c_func_to_recursive_line_31_to_42_0_#in~y3.offset|) 0) .cse0) (or .cse0 (= (+ (select (select |c_old(#memory_int#2)| |c_func_to_recursive_line_31_to_42_0_#in~y2.base|) |c_func_to_recursive_line_31_to_42_0_#in~y2.offset|) (* (select (select |c_#memory_int#3| |c_func_to_recursive_line_31_to_42_0_#in~x2.base|) |c_func_to_recursive_line_31_to_42_0_#in~x2.offset|) (select (select |c_old(#memory_int#5)| |c_func_to_recursive_line_31_to_42_0_#in~y1.base|) |c_func_to_recursive_line_31_to_42_0_#in~y1.offset|))) (select (select |c_#memory_int#1| |c_func_to_recursive_line_31_to_42_0_#in~x1.base|) |c_func_to_recursive_line_31_to_42_0_#in~x1.offset|))) (forall ((|v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_7| Int)) (let ((.cse1 (select (select |c_#memory_int#1| |v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_7|) |v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_7|)) (.cse2 (select (select |c_#memory_int#3| |v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_7|) |v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_7|))) (or (= .cse1 (+ (select (select |c_#memory_int#2| |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_7|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_7|) (* .cse2 (select (select |c_#memory_int#5| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_7|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_7|)))) (not (= .cse1 (+ (* .cse2 (select (select |c_old(#memory_int#5)| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_7|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_7|)) (select (select |c_old(#memory_int#2)| |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_7|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_7|))))))))) is different from false [2024-09-20 20:01:42,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:01:42,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390329983] [2024-09-20 20:01:42,875 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:01:42,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166435231] [2024-09-20 20:01:42,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166435231] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:01:42,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:01:42,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-20 20:01:42,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378670828] [2024-09-20 20:01:42,875 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:01:42,876 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-20 20:01:42,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:01:42,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-20 20:01:42,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=483, Unknown=1, NotChecked=44, Total=600 [2024-09-20 20:01:42,877 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 17 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-20 20:01:43,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:01:43,686 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2024-09-20 20:01:43,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 20:01:43,686 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2024-09-20 20:01:43,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:01:43,687 INFO L225 Difference]: With dead ends: 62 [2024-09-20 20:01:43,687 INFO L226 Difference]: Without dead ends: 56 [2024-09-20 20:01:43,688 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=151, Invalid=974, Unknown=1, NotChecked=64, Total=1190 [2024-09-20 20:01:43,690 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 19 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 20:01:43,690 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 102 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 20:01:43,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-20 20:01:43,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2024-09-20 20:01:43,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 11 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-09-20 20:01:43,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2024-09-20 20:01:43,708 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 47 [2024-09-20 20:01:43,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:01:43,708 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2024-09-20 20:01:43,708 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-20 20:01:43,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:43,709 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2024-09-20 20:01:43,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-20 20:01:43,710 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:01:43,710 INFO L216 NwaCegarLoop]: trace histogram [4, 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, 1] [2024-09-20 20:01:43,722 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 20:01:43,910 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-20 20:01:43,911 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:01:43,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:43,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1369950782, now seen corresponding path program 1 times [2024-09-20 20:01:43,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:01:43,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923036403] [2024-09-20 20:01:43,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:01:43,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:01:43,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:01:43,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [493663204] [2024-09-20 20:01:43,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:01:43,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:01:43,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:01:43,968 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) [2024-09-20 20:01:43,971 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 20:01:44,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:01:44,108 WARN L260 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 204 conjuncts are in the unsatisfiable core [2024-09-20 20:01:44,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:01:44,116 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 [2024-09-20 20:01:44,118 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 [2024-09-20 20:01:44,172 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 [2024-09-20 20:01:44,176 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 [2024-09-20 20:01:44,180 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 [2024-09-20 20:01:44,203 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 [2024-09-20 20:01:45,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-20 20:01:46,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2024-09-20 20:01:46,081 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 [2024-09-20 20:01:46,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-09-20 20:01:46,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-09-20 20:01:46,255 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 20:01:46,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:01:48,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:01:48,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923036403] [2024-09-20 20:01:48,332 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:01:48,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493663204] [2024-09-20 20:01:48,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493663204] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:01:48,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:01:48,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-09-20 20:01:48,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826056711] [2024-09-20 20:01:48,333 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:01:48,333 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-20 20:01:48,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:01:48,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-20 20:01:48,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2024-09-20 20:01:48,334 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 27 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 23 states have internal predecessors, (33), 9 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-20 20:01:52,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 20:01:54,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:01:54,117 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2024-09-20 20:01:54,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-20 20:01:54,117 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 23 states have internal predecessors, (33), 9 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Word has length 60 [2024-09-20 20:01:54,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:01:54,119 INFO L225 Difference]: With dead ends: 68 [2024-09-20 20:01:54,119 INFO L226 Difference]: Without dead ends: 62 [2024-09-20 20:01:54,119 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=183, Invalid=1709, Unknown=0, NotChecked=0, Total=1892 [2024-09-20 20:01:54,120 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 23 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-09-20 20:01:54,120 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 188 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 769 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2024-09-20 20:01:54,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-09-20 20:01:54,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2024-09-20 20:01:54,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 39 states have internal predecessors, (41), 12 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2024-09-20 20:01:54,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2024-09-20 20:01:54,137 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 60 [2024-09-20 20:01:54,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:01:54,137 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2024-09-20 20:01:54,137 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 23 states have internal predecessors, (33), 9 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-20 20:01:54,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:54,138 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2024-09-20 20:01:54,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-20 20:01:54,138 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:01:54,139 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-09-20 20:01:54,167 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 20:01:54,339 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:01:54,339 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:01:54,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:54,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1588805500, now seen corresponding path program 2 times [2024-09-20 20:01:54,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:01:54,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282401912] [2024-09-20 20:01:54,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:01:54,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:01:54,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:01:54,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843801692] [2024-09-20 20:01:54,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 20:01:54,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:01:54,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:01:54,372 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) [2024-09-20 20:01:54,373 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 20:01:54,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 20:01:54,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 20:01:54,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 161 conjuncts are in the unsatisfiable core [2024-09-20 20:01:54,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:01:54,511 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 [2024-09-20 20:01:54,512 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 [2024-09-20 20:01:54,515 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 [2024-09-20 20:01:54,516 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 [2024-09-20 20:01:54,519 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 [2024-09-20 20:01:54,531 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 [2024-09-20 20:01:55,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2024-09-20 20:01:55,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-09-20 20:01:55,310 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 [2024-09-20 20:01:55,347 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 [2024-09-20 20:01:55,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-20 20:01:55,409 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-20 20:01:55,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:02:00,962 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_old(#memory_int#2)| |c_func_to_recursive_line_31_to_42_0_#in~y2.base|))) (let ((.cse3 (select .cse2 |c_func_to_recursive_line_31_to_42_0_#in~y2.offset|)) (.cse0 (forall ((|v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_17| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_17| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_17| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_17| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_17| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_17| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_17| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_17| Int)) (= (+ (select (select |c_#memory_int#2| |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_17|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_17|) (* (select (select |c_#memory_int#3| |v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_17|) |v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_17|) (select (select |c_#memory_int#5| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_17|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_17|))) (select (select |c_#memory_int#1| |v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_17|) |v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_17|))))) (and (or (= (select (select |c_old(#memory_int#4)| |c_func_to_recursive_line_31_to_42_0_#in~y3.base|) |c_func_to_recursive_line_31_to_42_0_#in~y3.offset|) 1) .cse0) (forall ((|v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_17| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_17| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_17| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_17| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_17| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_17| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_17| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_17| Int)) (let ((.cse1 (select (select |c_#memory_int#3| |v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_17|) |v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_17|)) (.cse4 (select (select |c_#memory_int#1| |v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_17|) |v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_17|))) (or (not (= (+ (* (select (select |c_old(#memory_int#5)| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_17|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_17|) .cse1) (select (select (store |c_old(#memory_int#2)| |c_func_to_recursive_line_31_to_42_0_#in~y2.base| (store .cse2 |c_func_to_recursive_line_31_to_42_0_#in~y2.offset| (+ .cse3 1))) |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_17|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_17|)) .cse4)) (= (+ (select (select |c_#memory_int#2| |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_17|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_17|) (* .cse1 (select (select |c_#memory_int#5| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_17|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_17|))) .cse4)))) (or (= (+ .cse3 (* (select (select |c_#memory_int#3| |c_func_to_recursive_line_31_to_42_0_#in~x2.base|) |c_func_to_recursive_line_31_to_42_0_#in~x2.offset|) (select (select |c_old(#memory_int#5)| |c_func_to_recursive_line_31_to_42_0_#in~y1.base|) |c_func_to_recursive_line_31_to_42_0_#in~y1.offset|)) 1) (select (select |c_#memory_int#1| |c_func_to_recursive_line_31_to_42_0_#in~x1.base|) |c_func_to_recursive_line_31_to_42_0_#in~x1.offset|)) .cse0)))) is different from false [2024-09-20 20:02:01,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:02:01,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282401912] [2024-09-20 20:02:01,190 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:02:01,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843801692] [2024-09-20 20:02:01,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843801692] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:02:01,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:02:01,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-20 20:02:01,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137799762] [2024-09-20 20:02:01,190 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:02:01,191 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-20 20:02:01,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:02:01,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-20 20:02:01,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=582, Unknown=1, NotChecked=48, Total=702 [2024-09-20 20:02:01,192 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 20 states, 15 states have (on average 2.2) internal successors, (33), 17 states have internal predecessors, (33), 8 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-20 20:02:02,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:02:02,320 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2024-09-20 20:02:02,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-20 20:02:02,321 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 2.2) internal successors, (33), 17 states have internal predecessors, (33), 8 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 60 [2024-09-20 20:02:02,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:02:02,323 INFO L225 Difference]: With dead ends: 70 [2024-09-20 20:02:02,323 INFO L226 Difference]: Without dead ends: 64 [2024-09-20 20:02:02,324 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=154, Invalid=1181, Unknown=1, NotChecked=70, Total=1406 [2024-09-20 20:02:02,325 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 21 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 20:02:02,325 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 113 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 20:02:02,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-09-20 20:02:02,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2024-09-20 20:02:02,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 39 states have internal predecessors, (41), 12 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2024-09-20 20:02:02,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2024-09-20 20:02:02,355 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 60 [2024-09-20 20:02:02,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:02:02,355 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2024-09-20 20:02:02,356 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 2.2) internal successors, (33), 17 states have internal predecessors, (33), 8 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-20 20:02:02,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:02,356 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2024-09-20 20:02:02,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-20 20:02:02,357 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:02:02,357 INFO L216 NwaCegarLoop]: trace histogram [4, 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, 1] [2024-09-20 20:02:02,371 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-20 20:02:02,557 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:02:02,557 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:02:02,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:02,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1661192058, now seen corresponding path program 2 times [2024-09-20 20:02:02,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:02:02,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242385680] [2024-09-20 20:02:02,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:02:02,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:02:02,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:03,028 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 20:02:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:03,030 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 20:02:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:03,032 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 20:02:03,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:03,053 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 20:02:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:03,628 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:02:03,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:03,638 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 20:02:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:04,265 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:02:04,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:04,350 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 20:02:04,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:04,460 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:02:04,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:04,465 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-20 20:02:04,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:02:04,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242385680] [2024-09-20 20:02:04,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242385680] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:02:04,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026561547] [2024-09-20 20:02:04,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 20:02:04,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:02:04,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:02:04,467 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) [2024-09-20 20:02:04,468 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 20:02:04,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 20:02:04,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 20:02:04,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-20 20:02:04,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:02:04,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 20:02:04,585 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 [2024-09-20 20:02:04,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-20 20:02:04,894 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 14 treesize of output 10 [2024-09-20 20:02:04,967 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-20 20:02:04,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:02:05,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-20 20:02:05,698 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-20 20:02:05,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026561547] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 20:02:05,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 20:02:05,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 12] total 37 [2024-09-20 20:02:05,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560613341] [2024-09-20 20:02:05,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 20:02:05,699 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-20 20:02:05,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:02:05,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-20 20:02:05,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1193, Unknown=0, NotChecked=0, Total=1332 [2024-09-20 20:02:05,700 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 37 states, 28 states have (on average 2.107142857142857) internal successors, (59), 33 states have internal predecessors, (59), 16 states have call successors, (21), 6 states have call predecessors, (21), 7 states have return successors, (19), 12 states have call predecessors, (19), 15 states have call successors, (19) [2024-09-20 20:02:07,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:02:07,097 INFO L93 Difference]: Finished difference Result 82 states and 111 transitions. [2024-09-20 20:02:07,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-20 20:02:07,097 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 28 states have (on average 2.107142857142857) internal successors, (59), 33 states have internal predecessors, (59), 16 states have call successors, (21), 6 states have call predecessors, (21), 7 states have return successors, (19), 12 states have call predecessors, (19), 15 states have call successors, (19) Word has length 60 [2024-09-20 20:02:07,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:02:07,098 INFO L225 Difference]: With dead ends: 82 [2024-09-20 20:02:07,098 INFO L226 Difference]: Without dead ends: 74 [2024-09-20 20:02:07,099 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=318, Invalid=2334, Unknown=0, NotChecked=0, Total=2652 [2024-09-20 20:02:07,099 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 50 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-20 20:02:07,100 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 203 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-20 20:02:07,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-09-20 20:02:07,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2024-09-20 20:02:07,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 42 states have internal predecessors, (44), 12 states have call successors, (12), 10 states have call predecessors, (12), 12 states have return successors, (23), 13 states have call predecessors, (23), 10 states have call successors, (23) [2024-09-20 20:02:07,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2024-09-20 20:02:07,119 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 60 [2024-09-20 20:02:07,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:02:07,119 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2024-09-20 20:02:07,120 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 28 states have (on average 2.107142857142857) internal successors, (59), 33 states have internal predecessors, (59), 16 states have call successors, (21), 6 states have call predecessors, (21), 7 states have return successors, (19), 12 states have call predecessors, (19), 15 states have call successors, (19) [2024-09-20 20:02:07,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:07,120 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2024-09-20 20:02:07,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-20 20:02:07,121 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:02:07,121 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:02:07,137 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-20 20:02:07,324 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:02:07,324 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:02:07,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:07,325 INFO L85 PathProgramCache]: Analyzing trace with hash -742771557, now seen corresponding path program 3 times [2024-09-20 20:02:07,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:02:07,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721057070] [2024-09-20 20:02:07,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:02:07,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:02:07,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:02:07,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634428541] [2024-09-20 20:02:07,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 20:02:07,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:02:07,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:02:07,365 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) [2024-09-20 20:02:07,366 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 20:02:07,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-20 20:02:07,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 20:02:07,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 125 conjuncts are in the unsatisfiable core [2024-09-20 20:02:07,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:02:07,558 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 [2024-09-20 20:02:07,562 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 [2024-09-20 20:02:07,567 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 [2024-09-20 20:02:07,592 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 [2024-09-20 20:02:08,171 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 [2024-09-20 20:02:08,268 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-09-20 20:02:08,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:02:09,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:02:09,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721057070] [2024-09-20 20:02:09,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:02:09,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634428541] [2024-09-20 20:02:09,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634428541] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:02:09,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:02:09,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-20 20:02:09,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110838253] [2024-09-20 20:02:09,073 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:02:09,073 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-20 20:02:09,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:02:09,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-20 20:02:09,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2024-09-20 20:02:09,074 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 20 states, 16 states have (on average 1.9375) internal successors, (31), 17 states have internal predecessors, (31), 8 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-20 20:02:09,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:02:09,746 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2024-09-20 20:02:09,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-20 20:02:09,746 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.9375) internal successors, (31), 17 states have internal predecessors, (31), 8 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) Word has length 73 [2024-09-20 20:02:09,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:02:09,747 INFO L225 Difference]: With dead ends: 76 [2024-09-20 20:02:09,747 INFO L226 Difference]: Without dead ends: 70 [2024-09-20 20:02:09,748 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2024-09-20 20:02:09,748 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 20:02:09,748 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 151 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 20:02:09,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-09-20 20:02:09,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2024-09-20 20:02:09,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 43 states have internal predecessors, (45), 12 states have call successors, (12), 10 states have call predecessors, (12), 13 states have return successors, (25), 14 states have call predecessors, (25), 10 states have call successors, (25) [2024-09-20 20:02:09,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2024-09-20 20:02:09,779 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 73 [2024-09-20 20:02:09,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:02:09,779 INFO L474 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2024-09-20 20:02:09,779 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.9375) internal successors, (31), 17 states have internal predecessors, (31), 8 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-20 20:02:09,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:09,780 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2024-09-20 20:02:09,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-20 20:02:09,781 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:02:09,781 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:02:09,796 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-20 20:02:09,982 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-20 20:02:09,982 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:02:09,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:09,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1760672172, now seen corresponding path program 4 times [2024-09-20 20:02:09,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:02:09,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484519904] [2024-09-20 20:02:09,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:02:09,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:02:10,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:02:10,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [385370555] [2024-09-20 20:02:10,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 20:02:10,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:02:10,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:02:10,007 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) [2024-09-20 20:02:10,008 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 20:02:10,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 20:02:10,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 20:02:10,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 143 conjuncts are in the unsatisfiable core [2024-09-20 20:02:10,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:02:10,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 20:02:10,184 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 [2024-09-20 20:02:10,188 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 [2024-09-20 20:02:10,210 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 [2024-09-20 20:02:10,898 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 [2024-09-20 20:02:10,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-20 20:02:10,999 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2024-09-20 20:02:10,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:02:11,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-20 20:02:12,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:02:12,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484519904] [2024-09-20 20:02:12,027 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:02:12,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385370555] [2024-09-20 20:02:12,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385370555] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:02:12,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:02:12,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-20 20:02:12,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206149963] [2024-09-20 20:02:12,028 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:02:12,028 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-20 20:02:12,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:02:12,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-20 20:02:12,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2024-09-20 20:02:12,028 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 18 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 7 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-20 20:02:12,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:02:12,728 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2024-09-20 20:02:12,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 20:02:12,729 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 7 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) Word has length 86 [2024-09-20 20:02:12,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:02:12,730 INFO L225 Difference]: With dead ends: 78 [2024-09-20 20:02:12,730 INFO L226 Difference]: Without dead ends: 72 [2024-09-20 20:02:12,730 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2024-09-20 20:02:12,730 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 17 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 20:02:12,731 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 141 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 20:02:12,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-20 20:02:12,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2024-09-20 20:02:12,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 43 states have (on average 1.069767441860465) internal successors, (46), 44 states have internal predecessors, (46), 12 states have call successors, (12), 10 states have call predecessors, (12), 14 states have return successors, (27), 15 states have call predecessors, (27), 10 states have call successors, (27) [2024-09-20 20:02:12,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2024-09-20 20:02:12,752 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 86 [2024-09-20 20:02:12,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:02:12,753 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2024-09-20 20:02:12,753 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 7 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-20 20:02:12,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:12,753 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2024-09-20 20:02:12,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-20 20:02:12,754 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:02:12,754 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-09-20 20:02:12,767 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-20 20:02:12,954 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-20 20:02:12,955 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:02:12,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:12,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1442337340, now seen corresponding path program 2 times [2024-09-20 20:02:12,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:02:12,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964120837] [2024-09-20 20:02:12,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:02:12,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:02:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:02:12,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1513074590] [2024-09-20 20:02:12,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 20:02:12,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:02:12,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:02:12,992 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) [2024-09-20 20:02:12,996 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 20:02:13,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 20:02:13,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 20:02:13,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 172 conjuncts are in the unsatisfiable core [2024-09-20 20:02:13,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:02:13,148 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 [2024-09-20 20:02:13,150 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 [2024-09-20 20:02:13,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 20:02:13,170 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 [2024-09-20 20:02:13,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 20:02:14,119 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 [2024-09-20 20:02:14,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-20 20:02:14,199 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-20 20:02:14,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:02:16,092 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 20:02:16,093 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 50 treesize of output 53 [2024-09-20 20:02:16,098 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 46 [2024-09-20 20:02:16,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:02:16,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964120837] [2024-09-20 20:02:16,246 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:02:16,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513074590] [2024-09-20 20:02:16,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513074590] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:02:16,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:02:16,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-20 20:02:16,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718912338] [2024-09-20 20:02:16,246 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:02:16,247 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 20:02:16,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:02:16,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 20:02:16,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2024-09-20 20:02:16,247 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand has 21 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-09-20 20:02:17,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:02:17,209 INFO L93 Difference]: Finished difference Result 80 states and 98 transitions. [2024-09-20 20:02:17,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 20:02:17,209 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 60 [2024-09-20 20:02:17,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:02:17,211 INFO L225 Difference]: With dead ends: 80 [2024-09-20 20:02:17,211 INFO L226 Difference]: Without dead ends: 74 [2024-09-20 20:02:17,211 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2024-09-20 20:02:17,212 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 24 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 20:02:17,212 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 146 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 20:02:17,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-09-20 20:02:17,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2024-09-20 20:02:17,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 45 states have internal predecessors, (47), 12 states have call successors, (12), 10 states have call predecessors, (12), 15 states have return successors, (29), 16 states have call predecessors, (29), 10 states have call successors, (29) [2024-09-20 20:02:17,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2024-09-20 20:02:17,246 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 60 [2024-09-20 20:02:17,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:02:17,246 INFO L474 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2024-09-20 20:02:17,246 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-09-20 20:02:17,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:17,247 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2024-09-20 20:02:17,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-09-20 20:02:17,247 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:02:17,247 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:02:17,262 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-20 20:02:17,448 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:02:17,448 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:02:17,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:17,449 INFO L85 PathProgramCache]: Analyzing trace with hash 104908723, now seen corresponding path program 5 times [2024-09-20 20:02:17,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:02:17,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973813691] [2024-09-20 20:02:17,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:02:17,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:02:17,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:02:17,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [534734640] [2024-09-20 20:02:17,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 20:02:17,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:02:17,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:02:17,498 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) [2024-09-20 20:02:17,502 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-20 20:02:17,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-20 20:02:17,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 20:02:17,792 WARN L260 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 337 conjuncts are in the unsatisfiable core [2024-09-20 20:02:17,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:02:17,805 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 1 [2024-09-20 20:02:17,808 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 [2024-09-20 20:02:17,897 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 [2024-09-20 20:02:17,903 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 [2024-09-20 20:02:17,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 20:02:17,940 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 [2024-09-20 20:02:20,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2024-09-20 20:02:20,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-09-20 20:02:21,338 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 [2024-09-20 20:02:21,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-20 20:02:21,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-20 20:02:21,548 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 13 proven. 97 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-20 20:02:21,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:02:34,274 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse4 (select |c_old(#memory_int#2)| |c_func_to_recursive_line_31_to_42_0_#in~y2.base|))) (let ((.cse1 (select .cse4 |c_func_to_recursive_line_31_to_42_0_#in~y2.offset|)) (.cse0 (forall ((|v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_33| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_33| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_33| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_41| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_55| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_55| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_41| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_33| Int)) (= (select (select |c_#memory_int#1| |v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_33|) |v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_33|) (+ (* (select (select |c_#memory_int#3| |v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_41|) |v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_41|) (select (select |c_#memory_int#5| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_33|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_33|)) (select (select |c_#memory_int#2| |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_55|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_55|)))))) (and (or .cse0 (= (+ .cse1 4 (* (select (select |c_#memory_int#3| |c_func_to_recursive_line_31_to_42_0_#in~x2.base|) |c_func_to_recursive_line_31_to_42_0_#in~x2.offset|) (select (select |c_old(#memory_int#5)| |c_func_to_recursive_line_31_to_42_0_#in~y1.base|) |c_func_to_recursive_line_31_to_42_0_#in~y1.offset|))) (select (select |c_#memory_int#1| |c_func_to_recursive_line_31_to_42_0_#in~x1.base|) |c_func_to_recursive_line_31_to_42_0_#in~x1.offset|))) (forall ((|v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_33| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_33| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_33| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_41| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_55| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_55| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_41| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_33| Int)) (let ((.cse2 (select (select |c_#memory_int#1| |v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_33|) |v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_33|)) (.cse3 (select (select |c_#memory_int#3| |v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_41|) |v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_41|))) (or (not (= .cse2 (+ (* (select (select |c_old(#memory_int#5)| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_33|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_33|) .cse3) (select (select (store |c_old(#memory_int#2)| |c_func_to_recursive_line_31_to_42_0_#in~y2.base| (store .cse4 |c_func_to_recursive_line_31_to_42_0_#in~y2.offset| (+ .cse1 4))) |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_55|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_55|)))) (= .cse2 (+ (* .cse3 (select (select |c_#memory_int#5| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_33|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_33|)) (select (select |c_#memory_int#2| |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_55|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_55|)))))) (or (= (select (select |c_old(#memory_int#4)| |c_func_to_recursive_line_31_to_42_0_#in~y3.base|) |c_func_to_recursive_line_31_to_42_0_#in~y3.offset|) 4) .cse0)))) is different from false [2024-09-20 20:02:36,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:02:36,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973813691] [2024-09-20 20:02:36,146 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:02:36,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534734640] [2024-09-20 20:02:36,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534734640] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:02:36,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:02:36,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2024-09-20 20:02:36,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357168815] [2024-09-20 20:02:36,146 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:02:36,146 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-20 20:02:36,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:02:36,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-20 20:02:36,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1342, Unknown=2, NotChecked=74, Total=1560 [2024-09-20 20:02:36,147 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand has 32 states, 26 states have (on average 1.5) internal successors, (39), 28 states have internal predecessors, (39), 10 states have call successors, (11), 4 states have call predecessors, (11), 10 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2024-09-20 20:02:40,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 20:02:43,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:02:43,013 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2024-09-20 20:02:43,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-20 20:02:43,014 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 26 states have (on average 1.5) internal successors, (39), 28 states have internal predecessors, (39), 10 states have call successors, (11), 4 states have call predecessors, (11), 10 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) Word has length 99 [2024-09-20 20:02:43,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:02:43,015 INFO L225 Difference]: With dead ends: 82 [2024-09-20 20:02:43,015 INFO L226 Difference]: Without dead ends: 76 [2024-09-20 20:02:43,016 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 59 SyntacticMatches, 13 SemanticMatches, 54 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=267, Invalid=2705, Unknown=2, NotChecked=106, Total=3080 [2024-09-20 20:02:43,016 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2024-09-20 20:02:43,016 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 270 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 942 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2024-09-20 20:02:43,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-20 20:02:43,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2024-09-20 20:02:43,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 46 states have internal predecessors, (48), 12 states have call successors, (12), 10 states have call predecessors, (12), 16 states have return successors, (31), 17 states have call predecessors, (31), 10 states have call successors, (31) [2024-09-20 20:02:43,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2024-09-20 20:02:43,043 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 99 [2024-09-20 20:02:43,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:02:43,044 INFO L474 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2024-09-20 20:02:43,044 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 26 states have (on average 1.5) internal successors, (39), 28 states have internal predecessors, (39), 10 states have call successors, (11), 4 states have call predecessors, (11), 10 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2024-09-20 20:02:43,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:43,044 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2024-09-20 20:02:43,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-20 20:02:43,045 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:02:43,045 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:02:43,059 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-20 20:02:43,245 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-20 20:02:43,246 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:02:43,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:43,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1693025251, now seen corresponding path program 3 times [2024-09-20 20:02:43,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:02:43,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491463884] [2024-09-20 20:02:43,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:02:43,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:02:43,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:02:43,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2110763078] [2024-09-20 20:02:43,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 20:02:43,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:02:43,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:02:43,269 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) [2024-09-20 20:02:43,269 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-20 20:02:43,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-20 20:02:43,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 20:02:43,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 193 conjuncts are in the unsatisfiable core [2024-09-20 20:02:43,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:02:43,501 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 [2024-09-20 20:02:43,533 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 [2024-09-20 20:02:43,539 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 [2024-09-20 20:02:43,545 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 [2024-09-20 20:02:43,566 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 [2024-09-20 20:02:43,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-20 20:02:44,144 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 [2024-09-20 20:02:44,486 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 [2024-09-20 20:02:44,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-20 20:02:44,632 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 15 proven. 43 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-20 20:02:44,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:02:47,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 82 [2024-09-20 20:02:47,194 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 86 treesize of output 82 [2024-09-20 20:02:47,214 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 86 treesize of output 82 [2024-09-20 20:02:47,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:02:47,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491463884] [2024-09-20 20:02:47,349 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:02:47,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110763078] [2024-09-20 20:02:47,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110763078] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:02:47,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:02:47,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-20 20:02:47,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552454535] [2024-09-20 20:02:47,349 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:02:47,349 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-20 20:02:47,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:02:47,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-20 20:02:47,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2024-09-20 20:02:47,350 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 24 states, 19 states have (on average 1.894736842105263) internal successors, (36), 20 states have internal predecessors, (36), 10 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2024-09-20 20:02:48,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:02:48,349 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2024-09-20 20:02:48,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 20:02:48,349 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 1.894736842105263) internal successors, (36), 20 states have internal predecessors, (36), 10 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 73 [2024-09-20 20:02:48,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:02:48,350 INFO L225 Difference]: With dead ends: 82 [2024-09-20 20:02:48,350 INFO L226 Difference]: Without dead ends: 76 [2024-09-20 20:02:48,351 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=158, Invalid=1482, Unknown=0, NotChecked=0, Total=1640 [2024-09-20 20:02:48,351 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-20 20:02:48,351 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 154 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-20 20:02:48,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-20 20:02:48,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2024-09-20 20:02:48,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 46 states have (on average 1.065217391304348) internal successors, (49), 47 states have internal predecessors, (49), 12 states have call successors, (12), 10 states have call predecessors, (12), 17 states have return successors, (33), 18 states have call predecessors, (33), 10 states have call successors, (33) [2024-09-20 20:02:48,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 94 transitions. [2024-09-20 20:02:48,377 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 94 transitions. Word has length 73 [2024-09-20 20:02:48,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:02:48,377 INFO L474 AbstractCegarLoop]: Abstraction has 76 states and 94 transitions. [2024-09-20 20:02:48,377 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 1.894736842105263) internal successors, (36), 20 states have internal predecessors, (36), 10 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2024-09-20 20:02:48,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:48,378 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 94 transitions. [2024-09-20 20:02:48,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-20 20:02:48,378 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:02:48,378 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:02:48,393 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-20 20:02:48,582 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-20 20:02:48,583 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:02:48,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:48,584 INFO L85 PathProgramCache]: Analyzing trace with hash -608758051, now seen corresponding path program 3 times [2024-09-20 20:02:48,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:02:48,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995293217] [2024-09-20 20:02:48,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:02:48,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:02:48,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:02:48,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1901934362] [2024-09-20 20:02:48,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 20:02:48,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:02:48,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:02:48,622 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:02:48,630 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-20 20:02:48,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-20 20:02:48,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 20:02:48,904 WARN L260 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 267 conjuncts are in the unsatisfiable core [2024-09-20 20:02:48,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:02:48,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 20:02:48,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 20:02:48,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 20:02:48,986 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 [2024-09-20 20:02:48,990 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 [2024-09-20 20:02:49,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 20:02:49,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2024-09-20 20:02:50,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-09-20 20:02:50,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2024-09-20 20:02:50,809 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 34 treesize of output 22 [2024-09-20 20:02:50,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2024-09-20 20:02:50,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-09-20 20:02:50,967 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-20 20:02:50,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:02:54,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:02:54,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995293217] [2024-09-20 20:02:54,922 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:02:54,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901934362] [2024-09-20 20:02:54,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901934362] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:02:54,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:02:54,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-20 20:02:54,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684891610] [2024-09-20 20:02:54,922 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:02:54,922 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-20 20:02:54,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:02:54,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-20 20:02:54,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2024-09-20 20:02:54,923 INFO L87 Difference]: Start difference. First operand 76 states and 94 transitions. Second operand has 22 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 8 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-20 20:02:56,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:02:56,379 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2024-09-20 20:02:56,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-20 20:02:56,380 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 8 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 73 [2024-09-20 20:02:56,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:02:56,381 INFO L225 Difference]: With dead ends: 86 [2024-09-20 20:02:56,381 INFO L226 Difference]: Without dead ends: 80 [2024-09-20 20:02:56,382 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=132, Invalid=1274, Unknown=0, NotChecked=0, Total=1406 [2024-09-20 20:02:56,382 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 21 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-20 20:02:56,382 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 142 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-20 20:02:56,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-09-20 20:02:56,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2024-09-20 20:02:56,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 46 states have (on average 1.065217391304348) internal successors, (49), 47 states have internal predecessors, (49), 12 states have call successors, (12), 10 states have call predecessors, (12), 17 states have return successors, (33), 18 states have call predecessors, (33), 10 states have call successors, (33) [2024-09-20 20:02:56,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 94 transitions. [2024-09-20 20:02:56,411 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 94 transitions. Word has length 73 [2024-09-20 20:02:56,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:02:56,411 INFO L474 AbstractCegarLoop]: Abstraction has 76 states and 94 transitions. [2024-09-20 20:02:56,411 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 8 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-20 20:02:56,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:56,412 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 94 transitions. [2024-09-20 20:02:56,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-20 20:02:56,412 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:02:56,412 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:02:56,431 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-20 20:02:56,613 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-20 20:02:56,614 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:02:56,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:02:56,614 INFO L85 PathProgramCache]: Analyzing trace with hash 595133078, now seen corresponding path program 4 times [2024-09-20 20:02:56,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:02:56,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648961948] [2024-09-20 20:02:56,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:02:56,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:02:56,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:57,098 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 20:02:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:57,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 20:02:57,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:57,102 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 20:02:57,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:57,123 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 20:02:57,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:57,672 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:02:57,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:57,676 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 20:02:57,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:58,267 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:02:58,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:58,271 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 20:02:58,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:58,722 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:02:58,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:58,729 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 20:02:58,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:59,170 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:02:59,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:59,178 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 20:02:59,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:59,286 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:02:59,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:02:59,290 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 23 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-20 20:02:59,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:02:59,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648961948] [2024-09-20 20:02:59,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648961948] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:02:59,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091887421] [2024-09-20 20:02:59,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 20:02:59,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:02:59,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:02:59,292 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:02:59,292 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-20 20:02:59,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 20:02:59,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 20:02:59,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-09-20 20:02:59,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:02:59,494 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 [2024-09-20 20:02:59,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-09-20 20:02:59,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-20 20:03:00,017 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 14 treesize of output 10 [2024-09-20 20:03:00,168 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-09-20 20:03:00,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:03:00,527 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 22 treesize of output 14 [2024-09-20 20:03:01,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-20 20:03:01,184 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 14 treesize of output 10 [2024-09-20 20:03:01,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2024-09-20 20:03:01,880 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 20 proven. 72 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-20 20:03:01,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091887421] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 20:03:01,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 20:03:01,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14, 21] total 51 [2024-09-20 20:03:01,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330553768] [2024-09-20 20:03:01,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 20:03:01,881 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-20 20:03:01,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:03:01,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-20 20:03:01,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=2289, Unknown=0, NotChecked=0, Total=2550 [2024-09-20 20:03:01,882 INFO L87 Difference]: Start difference. First operand 76 states and 94 transitions. Second operand has 51 states, 37 states have (on average 2.189189189189189) internal successors, (81), 45 states have internal predecessors, (81), 24 states have call successors, (30), 8 states have call predecessors, (30), 10 states have return successors, (27), 20 states have call predecessors, (27), 23 states have call successors, (27) [2024-09-20 20:03:06,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:03:06,754 INFO L93 Difference]: Finished difference Result 202 states and 304 transitions. [2024-09-20 20:03:06,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-09-20 20:03:06,754 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 37 states have (on average 2.189189189189189) internal successors, (81), 45 states have internal predecessors, (81), 24 states have call successors, (30), 8 states have call predecessors, (30), 10 states have return successors, (27), 20 states have call predecessors, (27), 23 states have call successors, (27) Word has length 86 [2024-09-20 20:03:06,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:03:06,757 INFO L225 Difference]: With dead ends: 202 [2024-09-20 20:03:06,757 INFO L226 Difference]: Without dead ends: 145 [2024-09-20 20:03:06,763 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2807 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1518, Invalid=10254, Unknown=0, NotChecked=0, Total=11772 [2024-09-20 20:03:06,767 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 162 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 1899 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 2135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 1899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-20 20:03:06,768 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 422 Invalid, 2135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 1899 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-20 20:03:06,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-09-20 20:03:06,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 106. [2024-09-20 20:03:06,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 64 states have (on average 1.09375) internal successors, (70), 67 states have internal predecessors, (70), 16 states have call successors, (16), 12 states have call predecessors, (16), 25 states have return successors, (48), 26 states have call predecessors, (48), 14 states have call successors, (48) [2024-09-20 20:03:06,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 134 transitions. [2024-09-20 20:03:06,847 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 134 transitions. Word has length 86 [2024-09-20 20:03:06,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:03:06,847 INFO L474 AbstractCegarLoop]: Abstraction has 106 states and 134 transitions. [2024-09-20 20:03:06,848 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 37 states have (on average 2.189189189189189) internal successors, (81), 45 states have internal predecessors, (81), 24 states have call successors, (30), 8 states have call predecessors, (30), 10 states have return successors, (27), 20 states have call predecessors, (27), 23 states have call successors, (27) [2024-09-20 20:03:06,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:03:06,848 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 134 transitions. [2024-09-20 20:03:06,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-20 20:03:06,849 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:03:06,849 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:03:06,862 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-20 20:03:07,050 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-20 20:03:07,050 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:03:07,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:03:07,051 INFO L85 PathProgramCache]: Analyzing trace with hash 101233945, now seen corresponding path program 5 times [2024-09-20 20:03:07,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:03:07,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117027415] [2024-09-20 20:03:07,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:03:07,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:03:07,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:03:07,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [901275805] [2024-09-20 20:03:07,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 20:03:07,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:03:07,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:03:07,092 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:03:07,093 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-20 20:03:07,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-20 20:03:07,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 20:03:07,314 WARN L260 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 257 conjuncts are in the unsatisfiable core [2024-09-20 20:03:07,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:03:07,327 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 [2024-09-20 20:03:07,333 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 [2024-09-20 20:03:07,430 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 [2024-09-20 20:03:07,456 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 [2024-09-20 20:03:08,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 20:03:08,134 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 [2024-09-20 20:03:09,429 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 [2024-09-20 20:03:09,732 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 [2024-09-20 20:03:09,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-20 20:03:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 25 proven. 39 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-20 20:03:09,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:03:13,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 72 [2024-09-20 20:03:13,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2024-09-20 20:03:13,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:03:13,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117027415] [2024-09-20 20:03:13,647 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:03:13,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901275805] [2024-09-20 20:03:13,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901275805] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:03:13,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:03:13,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2024-09-20 20:03:13,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111235412] [2024-09-20 20:03:13,647 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:03:13,647 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-20 20:03:13,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:03:13,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-20 20:03:13,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1262, Unknown=0, NotChecked=0, Total=1406 [2024-09-20 20:03:13,648 INFO L87 Difference]: Start difference. First operand 106 states and 134 transitions. Second operand has 32 states, 25 states have (on average 1.52) internal successors, (38), 27 states have internal predecessors, (38), 11 states have call successors, (12), 5 states have call predecessors, (12), 8 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2024-09-20 20:03:17,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 20:03:20,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:03:20,230 INFO L93 Difference]: Finished difference Result 120 states and 150 transitions. [2024-09-20 20:03:20,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-20 20:03:20,230 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 25 states have (on average 1.52) internal successors, (38), 27 states have internal predecessors, (38), 11 states have call successors, (12), 5 states have call predecessors, (12), 8 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 73 [2024-09-20 20:03:20,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:03:20,231 INFO L225 Difference]: With dead ends: 120 [2024-09-20 20:03:20,231 INFO L226 Difference]: Without dead ends: 114 [2024-09-20 20:03:20,232 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=270, Invalid=2486, Unknown=0, NotChecked=0, Total=2756 [2024-09-20 20:03:20,232 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 23 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2024-09-20 20:03:20,233 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 216 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1027 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2024-09-20 20:03:20,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-09-20 20:03:20,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2024-09-20 20:03:20,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 69 states have internal predecessors, (72), 16 states have call successors, (16), 12 states have call predecessors, (16), 27 states have return successors, (51), 28 states have call predecessors, (51), 14 states have call successors, (51) [2024-09-20 20:03:20,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 139 transitions. [2024-09-20 20:03:20,277 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 139 transitions. Word has length 73 [2024-09-20 20:03:20,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:03:20,278 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 139 transitions. [2024-09-20 20:03:20,278 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 25 states have (on average 1.52) internal successors, (38), 27 states have internal predecessors, (38), 11 states have call successors, (12), 5 states have call predecessors, (12), 8 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2024-09-20 20:03:20,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:03:20,278 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 139 transitions. [2024-09-20 20:03:20,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-09-20 20:03:20,279 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:03:20,279 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:03:20,292 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-20 20:03:20,483 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:03:20,483 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:03:20,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:03:20,484 INFO L85 PathProgramCache]: Analyzing trace with hash 585988981, now seen corresponding path program 6 times [2024-09-20 20:03:20,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:03:20,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299462564] [2024-09-20 20:03:20,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:03:20,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:03:20,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:03:20,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [241689182] [2024-09-20 20:03:20,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 20:03:20,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:03:20,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:03:20,508 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:03:20,510 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-20 20:03:20,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-20 20:03:20,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 20:03:20,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 311 conjuncts are in the unsatisfiable core [2024-09-20 20:03:20,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:03:20,833 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 [2024-09-20 20:03:20,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 20:03:20,870 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 [2024-09-20 20:03:20,875 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 [2024-09-20 20:03:20,881 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 [2024-09-20 20:03:20,904 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 [2024-09-20 20:03:21,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-20 20:03:22,440 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 [2024-09-20 20:03:22,452 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 [2024-09-20 20:03:22,588 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-09-20 20:03:22,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:03:31,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:03:31,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299462564] [2024-09-20 20:03:31,659 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:03:31,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241689182] [2024-09-20 20:03:31,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241689182] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:03:31,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:03:31,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-20 20:03:31,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984066608] [2024-09-20 20:03:31,659 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:03:31,660 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 20:03:31,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:03:31,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 20:03:31,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=739, Unknown=1, NotChecked=0, Total=812 [2024-09-20 20:03:31,662 INFO L87 Difference]: Start difference. First operand 110 states and 139 transitions. Second operand has 23 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 20 states have internal predecessors, (34), 8 states have call successors, (10), 3 states have call predecessors, (10), 8 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-20 20:03:33,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:03:33,021 INFO L93 Difference]: Finished difference Result 126 states and 157 transitions. [2024-09-20 20:03:33,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-20 20:03:33,021 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 20 states have internal predecessors, (34), 8 states have call successors, (10), 3 states have call predecessors, (10), 8 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) Word has length 99 [2024-09-20 20:03:33,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:03:33,026 INFO L225 Difference]: With dead ends: 126 [2024-09-20 20:03:33,026 INFO L226 Difference]: Without dead ends: 120 [2024-09-20 20:03:33,027 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=125, Invalid=1280, Unknown=1, NotChecked=0, Total=1406 [2024-09-20 20:03:33,027 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-20 20:03:33,030 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 213 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-20 20:03:33,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-09-20 20:03:33,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 114. [2024-09-20 20:03:33,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 68 states have (on average 1.088235294117647) internal successors, (74), 71 states have internal predecessors, (74), 16 states have call successors, (16), 12 states have call predecessors, (16), 29 states have return successors, (53), 30 states have call predecessors, (53), 14 states have call successors, (53) [2024-09-20 20:03:33,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 143 transitions. [2024-09-20 20:03:33,086 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 143 transitions. Word has length 99 [2024-09-20 20:03:33,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:03:33,086 INFO L474 AbstractCegarLoop]: Abstraction has 114 states and 143 transitions. [2024-09-20 20:03:33,086 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 20 states have internal predecessors, (34), 8 states have call successors, (10), 3 states have call predecessors, (10), 8 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-20 20:03:33,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:03:33,086 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 143 transitions. [2024-09-20 20:03:33,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-20 20:03:33,091 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:03:33,091 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:03:33,106 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-20 20:03:33,292 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-20 20:03:33,292 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:03:33,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:03:33,292 INFO L85 PathProgramCache]: Analyzing trace with hash -687137836, now seen corresponding path program 4 times [2024-09-20 20:03:33,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:03:33,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451799421] [2024-09-20 20:03:33,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:03:33,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:03:33,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:03:33,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1717534298] [2024-09-20 20:03:33,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 20:03:33,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:03:33,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:03:33,333 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:03:33,334 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-20 20:03:33,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 20:03:33,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 20:03:33,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 243 conjuncts are in the unsatisfiable core [2024-09-20 20:03:33,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:03:33,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 20:03:33,599 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 [2024-09-20 20:03:33,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 20:03:33,626 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 [2024-09-20 20:03:33,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-20 20:03:34,124 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 [2024-09-20 20:03:34,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-20 20:03:34,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 20:03:34,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-20 20:03:34,834 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 [2024-09-20 20:03:34,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-20 20:03:34,955 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 18 proven. 59 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-09-20 20:03:34,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:03:38,097 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 86 treesize of output 82 [2024-09-20 20:03:38,117 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 86 treesize of output 82 [2024-09-20 20:03:38,137 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 86 treesize of output 82 [2024-09-20 20:03:38,168 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 86 treesize of output 82 [2024-09-20 20:03:38,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:03:38,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451799421] [2024-09-20 20:03:38,275 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:03:38,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717534298] [2024-09-20 20:03:38,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717534298] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:03:38,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:03:38,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-20 20:03:38,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938119543] [2024-09-20 20:03:38,276 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:03:38,277 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-20 20:03:38,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:03:38,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-20 20:03:38,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2024-09-20 20:03:38,277 INFO L87 Difference]: Start difference. First operand 114 states and 143 transitions. Second operand has 22 states, 17 states have (on average 2.0) internal successors, (34), 18 states have internal predecessors, (34), 9 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-20 20:03:39,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:03:39,210 INFO L93 Difference]: Finished difference Result 122 states and 154 transitions. [2024-09-20 20:03:39,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 20:03:39,210 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 2.0) internal successors, (34), 18 states have internal predecessors, (34), 9 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) Word has length 86 [2024-09-20 20:03:39,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:03:39,211 INFO L225 Difference]: With dead ends: 122 [2024-09-20 20:03:39,211 INFO L226 Difference]: Without dead ends: 116 [2024-09-20 20:03:39,212 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2024-09-20 20:03:39,212 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 20 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-20 20:03:39,212 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 165 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-20 20:03:39,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-09-20 20:03:39,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2024-09-20 20:03:39,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 72 states have internal predecessors, (75), 16 states have call successors, (16), 12 states have call predecessors, (16), 30 states have return successors, (56), 31 states have call predecessors, (56), 14 states have call successors, (56) [2024-09-20 20:03:39,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 147 transitions. [2024-09-20 20:03:39,263 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 147 transitions. Word has length 86 [2024-09-20 20:03:39,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:03:39,263 INFO L474 AbstractCegarLoop]: Abstraction has 116 states and 147 transitions. [2024-09-20 20:03:39,264 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 2.0) internal successors, (34), 18 states have internal predecessors, (34), 9 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-20 20:03:39,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:03:39,264 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 147 transitions. [2024-09-20 20:03:39,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-20 20:03:39,264 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:03:39,264 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:03:39,278 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-20 20:03:39,464 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:03:39,465 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:03:39,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:03:39,465 INFO L85 PathProgramCache]: Analyzing trace with hash 533093464, now seen corresponding path program 7 times [2024-09-20 20:03:39,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:03:39,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969146871] [2024-09-20 20:03:39,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:03:39,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:03:39,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:03:39,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343199929] [2024-09-20 20:03:39,486 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 20:03:39,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:03:39,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:03:39,487 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:03:39,488 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-20 20:03:39,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:03:39,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 260 conjuncts are in the unsatisfiable core [2024-09-20 20:03:39,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:03:39,751 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 [2024-09-20 20:03:39,752 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 [2024-09-20 20:03:39,755 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 [2024-09-20 20:03:39,768 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 [2024-09-20 20:03:40,422 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 [2024-09-20 20:03:41,134 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 [2024-09-20 20:03:41,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-20 20:03:41,212 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2024-09-20 20:03:41,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:03:44,948 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 20:03:44,949 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 50 treesize of output 53 [2024-09-20 20:03:44,954 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 46 [2024-09-20 20:03:45,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:03:45,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969146871] [2024-09-20 20:03:45,143 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:03:45,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343199929] [2024-09-20 20:03:45,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343199929] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:03:45,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:03:45,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-20 20:03:45,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123315245] [2024-09-20 20:03:45,143 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:03:45,143 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 20:03:45,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:03:45,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 20:03:45,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2024-09-20 20:03:45,145 INFO L87 Difference]: Start difference. First operand 116 states and 147 transitions. Second operand has 23 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 7 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-20 20:03:46,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:03:46,293 INFO L93 Difference]: Finished difference Result 144 states and 180 transitions. [2024-09-20 20:03:46,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-20 20:03:46,294 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 7 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) Word has length 86 [2024-09-20 20:03:46,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:03:46,295 INFO L225 Difference]: With dead ends: 144 [2024-09-20 20:03:46,295 INFO L226 Difference]: Without dead ends: 138 [2024-09-20 20:03:46,295 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=160, Invalid=1172, Unknown=0, NotChecked=0, Total=1332 [2024-09-20 20:03:46,296 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 36 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-20 20:03:46,296 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 154 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-20 20:03:46,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-09-20 20:03:46,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 116. [2024-09-20 20:03:46,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 72 states have internal predecessors, (75), 16 states have call successors, (16), 12 states have call predecessors, (16), 30 states have return successors, (56), 31 states have call predecessors, (56), 14 states have call successors, (56) [2024-09-20 20:03:46,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 147 transitions. [2024-09-20 20:03:46,346 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 147 transitions. Word has length 86 [2024-09-20 20:03:46,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:03:46,347 INFO L474 AbstractCegarLoop]: Abstraction has 116 states and 147 transitions. [2024-09-20 20:03:46,347 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 7 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-20 20:03:46,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:03:46,347 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 147 transitions. [2024-09-20 20:03:46,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-20 20:03:46,348 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:03:46,348 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:03:46,362 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-20 20:03:46,548 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:03:46,548 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:03:46,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:03:46,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1874763602, now seen corresponding path program 8 times [2024-09-20 20:03:46,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:03:46,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693172622] [2024-09-20 20:03:46,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:03:46,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:03:46,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:03:46,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [884092039] [2024-09-20 20:03:46,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 20:03:46,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:03:46,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:03:46,570 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:03:46,571 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-20 20:03:46,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 20:03:46,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 20:03:46,869 WARN L260 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 309 conjuncts are in the unsatisfiable core [2024-09-20 20:03:46,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:03:46,877 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 [2024-09-20 20:03:46,879 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 [2024-09-20 20:03:46,881 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 [2024-09-20 20:03:46,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 20:03:46,892 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 [2024-09-20 20:03:46,908 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 [2024-09-20 20:03:47,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-20 20:03:48,798 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 [2024-09-20 20:03:48,806 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 [2024-09-20 20:03:48,945 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 30 proven. 37 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-20 20:03:48,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:03:54,979 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 70 treesize of output 62 [2024-09-20 20:03:54,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2024-09-20 20:03:54,992 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 58 treesize of output 54 [2024-09-20 20:03:59,037 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse5 (select |c_old(#memory_int#5)| |c_func_to_recursive_line_31_to_42_0_#in~y1.base|))) (let ((.cse0 (select |c_old(#memory_int#2)| |c_func_to_recursive_line_31_to_42_0_#in~y2.base|)) (.cse1 (select (select |c_#memory_int#3| |c_func_to_recursive_line_31_to_42_0_#in~x2.base|) |c_func_to_recursive_line_31_to_42_0_#in~x2.offset|)) (.cse6 (select .cse5 |c_func_to_recursive_line_31_to_42_0_#in~y1.offset|)) (.cse2 (forall ((|v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_66| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_66| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_90| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_128| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_128| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_112| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_108| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_90| Int)) (= (select (select |c_#memory_int#1| |v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_66|) |v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_66|) (+ (select (select |c_#memory_int#2| |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_128|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_128|) (* (select (select |c_#memory_int#3| |v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_112|) |v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_108|) (select (select |c_#memory_int#5| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_90|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_90|))))))) (and (or (= (+ (select .cse0 |c_func_to_recursive_line_31_to_42_0_#in~y2.offset|) 2) .cse1) .cse2) (forall ((|v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_66| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_66| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_90| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_128| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_128| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_90| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_112| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_108| Int)) (let ((.cse3 (select (select |c_#memory_int#1| |v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_66|) |v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_66|)) (.cse4 (select (select |c_#memory_int#3| |v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_112|) |v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_108|))) (or (not (= .cse3 (+ (select (select (store |c_old(#memory_int#2)| |c_func_to_recursive_line_31_to_42_0_#in~y2.base| (store .cse0 |c_func_to_recursive_line_31_to_42_0_#in~y2.offset| 1)) |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_128|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_128|) (* .cse4 (select (select (store |c_old(#memory_int#5)| |c_func_to_recursive_line_31_to_42_0_#in~y1.base| (store .cse5 |c_func_to_recursive_line_31_to_42_0_#in~y1.offset| (+ .cse6 1))) |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_90|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_90|))))) (= .cse3 (+ (select (select |c_#memory_int#2| |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_128|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_128|) (* .cse4 (select (select |c_#memory_int#5| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_90|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_90|))))))) (or (= (select (select |c_old(#memory_int#4)| |c_func_to_recursive_line_31_to_42_0_#in~y3.base|) |c_func_to_recursive_line_31_to_42_0_#in~y3.offset|) 3) .cse2) (or (< (select (select |c_#memory_int#1| |c_func_to_recursive_line_31_to_42_0_#in~x1.base|) |c_func_to_recursive_line_31_to_42_0_#in~x1.offset|) (+ .cse1 2 (* .cse1 .cse6))) .cse2)))) is different from false [2024-09-20 20:04:09,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:04:09,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693172622] [2024-09-20 20:04:09,593 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:04:09,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884092039] [2024-09-20 20:04:09,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884092039] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:04:09,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:04:09,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-20 20:04:09,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59736372] [2024-09-20 20:04:09,594 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:04:09,594 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-20 20:04:09,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:04:09,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-20 20:04:09,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=907, Unknown=3, NotChecked=60, Total=1056 [2024-09-20 20:04:09,595 INFO L87 Difference]: Start difference. First operand 116 states and 147 transitions. Second operand has 25 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 21 states have internal predecessors, (35), 8 states have call successors, (11), 3 states have call predecessors, (11), 7 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-20 20:04:14,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:04:14,447 INFO L93 Difference]: Finished difference Result 134 states and 168 transitions. [2024-09-20 20:04:14,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-20 20:04:14,448 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 21 states have internal predecessors, (35), 8 states have call successors, (11), 3 states have call predecessors, (11), 7 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 86 [2024-09-20 20:04:14,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:04:14,449 INFO L225 Difference]: With dead ends: 134 [2024-09-20 20:04:14,449 INFO L226 Difference]: Without dead ends: 128 [2024-09-20 20:04:14,450 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=152, Invalid=1571, Unknown=3, NotChecked=80, Total=1806 [2024-09-20 20:04:14,450 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 22 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-09-20 20:04:14,450 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 185 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-09-20 20:04:14,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-09-20 20:04:14,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 120. [2024-09-20 20:04:14,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 74 states have internal predecessors, (77), 16 states have call successors, (16), 12 states have call predecessors, (16), 32 states have return successors, (59), 33 states have call predecessors, (59), 14 states have call successors, (59) [2024-09-20 20:04:14,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 152 transitions. [2024-09-20 20:04:14,511 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 152 transitions. Word has length 86 [2024-09-20 20:04:14,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:04:14,511 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 152 transitions. [2024-09-20 20:04:14,511 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 21 states have internal predecessors, (35), 8 states have call successors, (11), 3 states have call predecessors, (11), 7 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-20 20:04:14,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:04:14,511 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 152 transitions. [2024-09-20 20:04:14,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-20 20:04:14,512 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:04:14,512 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:04:14,526 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-20 20:04:14,716 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-20 20:04:14,717 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:04:14,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:04:14,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1597307794, now seen corresponding path program 9 times [2024-09-20 20:04:14,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:04:14,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896013825] [2024-09-20 20:04:14,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:04:14,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:04:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:04:14,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982129347] [2024-09-20 20:04:14,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 20:04:14,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:04:14,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:04:14,771 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:04:14,773 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-20 20:04:15,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-20 20:04:15,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 20:04:15,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 322 conjuncts are in the unsatisfiable core [2024-09-20 20:04:15,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:04:15,239 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 [2024-09-20 20:04:15,248 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 [2024-09-20 20:04:17,133 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 [2024-09-20 20:04:17,995 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 34 [2024-09-20 20:04:18,003 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 47 treesize of output 35 [2024-09-20 20:04:18,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2024-09-20 20:04:18,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-09-20 20:04:19,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-20 20:04:19,260 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 42 treesize of output 30 [2024-09-20 20:04:19,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2024-09-20 20:04:19,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-09-20 20:04:19,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-20 20:04:19,647 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 [2024-09-20 20:04:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 63 proven. 94 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2024-09-20 20:04:19,884 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:04:30,181 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 88 treesize of output 84 [2024-09-20 20:04:30,212 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 20:04:30,212 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 153 treesize of output 144 [2024-09-20 20:04:30,460 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 8 treesize of output 4 [2024-09-20 20:04:30,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:04:30,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896013825] [2024-09-20 20:04:30,943 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:04:30,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982129347] [2024-09-20 20:04:30,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982129347] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:04:30,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:04:30,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-20 20:04:30,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594282821] [2024-09-20 20:04:30,943 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:04:30,943 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-20 20:04:30,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:04:30,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-20 20:04:30,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2024-09-20 20:04:30,944 INFO L87 Difference]: Start difference. First operand 120 states and 152 transitions. Second operand has 25 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 9 states have call successors, (14), 4 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-20 20:04:34,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:04:34,395 INFO L93 Difference]: Finished difference Result 130 states and 166 transitions. [2024-09-20 20:04:34,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-20 20:04:34,395 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 9 states have call successors, (14), 4 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 8 states have call successors, (12) Word has length 112 [2024-09-20 20:04:34,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:04:34,396 INFO L225 Difference]: With dead ends: 130 [2024-09-20 20:04:34,396 INFO L226 Difference]: Without dead ends: 0 [2024-09-20 20:04:34,397 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=255, Invalid=1907, Unknown=0, NotChecked=0, Total=2162 [2024-09-20 20:04:34,397 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 32 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-20 20:04:34,397 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 141 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-20 20:04:34,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-20 20:04:34,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-20 20:04:34,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 20:04:34,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-20 20:04:34,398 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 112 [2024-09-20 20:04:34,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:04:34,398 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-20 20:04:34,398 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 9 states have call successors, (14), 4 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-20 20:04:34,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:04:34,399 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-20 20:04:34,399 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-20 20:04:34,401 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-20 20:04:34,410 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-20 20:04:34,605 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:04:34,608 INFO L408 BasicCegarLoop]: Path program histogram: [9, 5, 4, 1, 1, 1, 1] [2024-09-20 20:04:34,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-20 20:04:40,499 WARN L293 SmtUtils]: Spent 5.68s on a formula simplification. DAG size of input: 437 DAG size of output: 851 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-09-20 20:04:49,883 WARN L293 SmtUtils]: Spent 6.28s on a formula simplification. DAG size of input: 449 DAG size of output: 883 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-09-20 20:04:57,055 WARN L293 SmtUtils]: Spent 6.84s on a formula simplification. DAG size of input: 410 DAG size of output: 1019 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-09-20 20:05:03,822 WARN L293 SmtUtils]: Spent 5.57s on a formula simplification. DAG size of input: 437 DAG size of output: 851 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-09-20 20:05:12,876 WARN L293 SmtUtils]: Spent 6.08s on a formula simplification. DAG size of input: 449 DAG size of output: 883 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-09-20 20:05:20,071 WARN L293 SmtUtils]: Spent 6.87s on a formula simplification. DAG size of input: 410 DAG size of output: 1019 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or)